1 mg–500 mg Weight Set Three-Point Polished Stainless Steel Plates, Plastic Case, OIML Class M1 - KERN

Take advantage of a robust, natural-wood storage solution that combines compact protection with clear organisation for small laboratory masses; order the wooden case directly via Metav Werkzeuge or consult our specialists for matching storage options. KERN Wooden Case 338-090-200 — for individual precision weights, unpadded A sturdy KERN wooden case designed to store individual precision weights for calibration, inspection and controlled transport in laboratories and workshops Natural wood construction, durable finish Designed for single weights, button/compact form Fits nominal values from 1 mg to 500 mg Lightweight transport case, compact footprint Secure storage that preserves measurement integrity The wooden case provides a reliable housing for precision weights, keeping each piece separated and accessible. Its unpadded layout reduces the risk of contamination that can occur when fibres from linings migrate onto mass standards; at the same time the snug compartments prevent lateral movement, lowering abrasion and measurement drift during handling. The natural-wood shell offers dimensional stability and a tactile, professional finish that supports repeatable calibration procedures. Practical compatibility for calibration and quality control Designed for single, button-style or compact weights, the case accommodates nominal values between 1 mg and 500 mg, making it suitable for small-mass work in calibration labs and quality assurance. Clear organisation of individual slots accelerates inventory checks and instrument set-up, reducing downtime during verification tasks. The simple internal layout also facilitates routine cleanliness checks and makes it straightforward to pair weights with calibration reports or tare lists. Durable materials and straightforward handling Constructed from responsibly sourced natural wood, the case balances low weight with robust protection for small masses. The unpadded interior is intentionally chosen for applications where lint-free storage is preferred; this supports traceable mass handling and reduces the need for frequent re-cleaning of weights. The compact footprint and light overall weight simplify storage on workshop trolleys or inside cabinet drawers while maintaining immediate access to critical measurement standards. For secure storage and fast supply from Emmerich, contact Metav Werkzeuge to request the KERN wooden case 338-090-200 or ask for advice at info@metav-werkzeuge.com or by phone on +49 2822 7131930 Technical data Article number: 338 SKU: 338-090-200 Manufacturer: KERN Material: Wood Unpadded interior Fits nominal values 1 mg – 500 mg (single) GTIN: 4045761007291 Facts Net weight: 0.13 kg Customs tariff (CN): 84239090 eCl@ss: 21100103 Origin: DE Special features For individual weights (button / compact) Product category: Test weights / Cases Category path: Scales › Test weights Unpadded design for lint-free storage Lightweight, compact footprint for easy storage FAQ Is this case suitable for button or compact weights? Yes. The KERN wooden case 338-090-200 is designed specifically for single button/compact weights and organises them for quick access during calibration. Can the case accommodate weights down to 1 mg? The case fits nominal values from 1 mg up to 500 mg, making it suitable for small-mass sets used in fine measurement tasks. Does the interior include cushioning to protect delicate masses? The interior is unpadded by design; this supports lint-free storage and simplifies cleanliness control for precision masses. Who supplies this case and where is it shipped from? Metav Werkzeuge supplies the KERN wooden case 338-090-200 and ships from Emmerich am Rhein with transparent order processing for workshop and industry clients. Metav Werkzeuge, Emmerich am Rhein, Germany — info@metav-werkzeuge.com — +49 2822 7131930

Benefit from robust plastic construction, compatibility with single nominal values 1 mg–500 mg and secure organisation for calibration weights of classes E1–M2, ensuring reliable storage and easy handling. Order the case directly via Metav Werkzeuge or ask our consultants if needed. KERN 347-009-400 Plastic Case for Single Calibration Weights – for 1 mg–500 mg, E1–M2 The KERN 347-009-400 is a compact plastic case designed to protect and organise single calibration weights for laboratories, service engineers and workshop calibration tasks. Compact plastic case for calibration weights Fits single weights from 1 mg to 500 mg Compatible with classes E1 to M2 Lightweight at approx. 0.02 kg Protects precision weights during storage and transport The case provides secure storage for individual calibration weights, reducing the risk of contamination and handling damage that can alter mass values. The internal layout is adapted for button/compact designs commonly used in calibration sets; this keeps each weight separated and stable during transport. By using a dedicated enclosure made from durable plastic, routine handling becomes more predictable and safer for sensitive measurement artefacts. Ensures compatibility with recognised accuracy classes Designed for nominal values from 1 mg–500 mg, the enclosure supports weights used across common accuracy classes E1–M2, which makes it suitable for laboratory checks and field calibration. For readers less familiar with classes: E1 and M2 denote standardised tolerance ranges used in legal and laboratory metrology; storing weights in the correct case helps maintain traceability and reduces the chance of cross-contamination that could compromise conformity checks. Lightweight, compact design for efficient workflow At roughly 0.02 kg, the case contributes negligible additional mass while offering a compact footprint for bench or toolbox storage. The plastic construction balances low weight with sufficient rigidity to protect contents, enabling technicians to carry sets between site visits without bulky packaging. The space-saving profile also assists in organised inventory management, simplifying quick selection and return of individual weights during calibration routines. Practical benefits for workshops and calibration services For calibration laboratories, service teams and quality departments, a purpose-built case streamlines handling and reduces downtime caused by misplaced or contaminated weights. The product supports better operational consistency by keeping single calibration weights in order and immediately accessible, which translates into fewer interruptions during measurement tasks and a smoother calibration workflow. Contact Metav Werkzeuge for delivery from Emmerich, tailored advice or technical clarification via info@metav-werkzeuge.com or call +49 2822 7131930 Technical Data Article number: 347 SKU: 347-009-400 GTIN: 4045761008625 Manufacturer: KERN Facts Weight: 0.02 kg Nominal values: 1 mg–500 mg HS code: 84239090 Special features Material: Plastic For: single calibration weights (button/compact) Class compatibility: E1–M2 Country of origin: DE FAQ Which nominal values fit in this case? The KERN 347-009-400 accommodates single weights with nominal values from 1 mg to 500 mg. Is the case suitable for weights with button or compact form? Yes, the enclosure is intended for button/compact designs and keeps each single weight separated for safe storage. Which accuracy classes are compatible with the case? The case is compatible with weights in accuracy classes E1 to M2 and is suitable for laboratory and workshop use. What material is the case made from and how heavy is it? The case is constructed from plastic and weighs approximately 0.02 kg, offering a lightweight yet protective solution. Manufacturer: KERN, Address: Germany, Contact: not specified

Take advantage of precise storage, robust protection and a padded interior to keep single metrological weights safe and ready for immediate use; order the case directly via Metav Werkzeuge or ask our consultants for additional specifications Aluminium-protected case 317-009-600 — single-weights storage for 1 mg–500 mg, KERN The Aluminium-protected case is a compact, purpose-built storage solution for single metrological weights, designed for safe handling and routine use in calibration labs and workshops Aluminium-protected housing for robust transport Suitable for single weights 1 mg–500 mg Compatible with classes E1–M3 Padded interior for shock protection Built for secure, standards-compliant storage The aluminium shell provides a rigid outer barrier that protects delicate calibration weights from mechanical stress and contamination. By combining a lightweight aluminium construction with an internal padding system, the case offers mechanical protection and dimensional stability without adding unnecessary bulk. This design keeps single weights organised and protected, ensuring quick access during calibration tasks and reducing the risk of damage that can affect measurement accuracy. Ensures traceability and correct handling for metrology workflows Storage that supports metrological routines contributes directly to reliable results. The case is specified for weights in the range 1 mg–500 mg and for classes E1–M3, which makes it suitable for a wide range of laboratory and industrial calibration scenarios. Separate compartments for individual pieces and the padded interior reduce handling errors and minimise cross-contamination, helping maintain the declared tolerance and prolonging the service life of precision weights. Practical benefits that support everyday work in the workshop Lightweight and compact, the case simplifies logistics in environments where secure transport and secure storage are required. The rigid aluminium exterior resists deformation during routine movement, while the internal padding cushions delicate surfaces. This combination reduces downtime caused by damaged weights and supports efficient workflows in quality control and inspection routines, contributing to predictable throughput and fewer interruptions. Contact Metav Werkzeuge today to discuss the KERN aluminium-protected case 317-009-600 and secure a reliable storage solution for precision weights — email info@metav-werkzeuge.com or call +49 2822 7131930 Technical data Article number: 317-009-600 Manufacturer: KERN SKU: 317-009-600 GTIN: 4045761223592 Facts Weight range: 1 mg–500 mg Suitable classes: E1–M3 Net weight: 0.3 kg HS code: 84239090 Origin: CN Special features Material: Aluminium Interior: padded Product group: aluminium-protected cases for single weights Product category: test weights / cases FAQ Is the case suitable for single weights from 1 mg to 500 mg? The aluminium-protected case 317-009-600 is specified for single weights in the range 1 mg–500 mg and supports organised storage for that range. Which weight classes can be stored in this case? This case is compatible with weights of classes E1–M3, making it suitable for a variety of calibration and inspection tasks requiring high accuracy. Does the interior protect against shock and abrasion? The interior of the KERN aluminium-protected case features padding that cushions weights and reduces the risk of mechanical damage and surface abrasion during transport and handling. Can the case be used for routine transport between sites? The rigid aluminium housing and padded interior of the 317-009-600 provide robust protection suitable for routine transport within laboratory and workshop environments. KERN — Origin: China; Contact: Metav Werkzeuge, Emmerich — eMail: info@metav-werkzeuge.com, Phone: +49 2822 7131930

Accurate handling of small calibration masses is achieved through the combination of stainless-steel construction, high-quality plastic tips and a practical 136 mm length; order the KERN 315-247 tweezers directly via Metav Werkzeuge or consult our product specialists for application advice. KERN 315-247 — Calibration tweezers with straight plastic tips A KERN 315-247 tweezers designed for secure, non-marking handling of small calibration weights in metrology and workshop environments. Straight stainless-steel tips for secure grip High-quality plastic tips to protect weights 136 mm length for precise, ergonomic handling Secure handling for exact calibration results For precision tasks, secure handling is essential. The instrument offers a controlled grip on calibration masses up to ≤ 5 g, compatible with classes E1–M3, which helps reduce handling errors and improves repeatability in weighing procedures. Constructed to meet the demands of metrology, the tool supports consistent measurement routines and minimises the risk of surface contact that could alter a weight’s value. By using a purpose-made tweezer rather than fingers, the chance of contamination and thermal transfer is lowered, contributing to more reliable results in daily quality checks. Durable build with gentle contact to sensitive masses A corrosion-resistant body delivers long service life while the high-quality plastic tips preserve delicate surfaces. The combination of stainless steel strength and soft tip protection ensures that fine calibration weights are neither scratched nor displaced during handling. The straight tip geometry provides direct visual control when picking up minute masses, and the construction requires minimal maintenance. This balance of durability and gentle contact supports both routine laboratory work and demanding workshop environments where component care matters. Practical design to streamline laboratory and workshop workflows Measuring 136 mm in length and weighing about 0.02 kg, the tweezers are optimised for comfortable, precise handling throughout repetitive tasks. The tool’s length offers ergonomic reach without compromising manoeuvrability at the balance pan, enabling steady placement and removal of weights during calibration cycles. Designed for integration into existing metrology workflows, the device supports standard operating procedures and helps technicians maintain efficient throughput while preserving measurement integrity. For further clarification on application limits or compatibility with specific test procedures, Metav’s consultants can advise on best practice. For supply and technical guidance on the KERN 315-247 tweezers, contact Metav Werkzeuge in Emmerich — email info@metav-werkzeuge.com or phone +49 2822 7131930 Technical data SKU: 315-247 Manufacturer: KERN GTIN: 4045761222922 Specifications Length: 136 mm Weight: 0.02 kg Suitable for weights: ≤ 5 g (classes E1–M3) Features Material: stainless steel with high-quality plastic tips Tip design: straight tips FAQ Which calibration weight classes can be handled with these tweezers? The tweezers are suitable for calibration masses up to ≤ 5 g and compatible with classes E1–M3, making them appropriate for fine-weight handling in precision weighing tasks. Are the plastic tips safe for delicate weight surfaces? Yes, the high-quality plastic tips are designed to protect sensitive surfaces and reduce the risk of scratching or marking during handling of calibration weights. What are the dimensions and mass of the tweezers? The tweezers measure 136 mm in length and have an approximate mass of 0.02 kg, providing a balance of reach and lightness for repeated use. Is this tool suitable for routine laboratory workflows? The design supports routine metrology and workshop workflows by offering ergonomic handling, controlled grip and surface protection, which together help maintain measurement consistency. Who supplies the product and where can further technical advice be obtained? The product is supplied by KERN (SKU 315-247); for application-specific advice and supply options, Metav Werkzeuge can provide consultancy and ordering information. KERN

Take advantage of the combination of high metrological accuracy, robust stainless steel construction and compact handling for precise calibration of microbalances and laboratory scales. Order the test mass directly via Metav Werkzeuge or consult the Emmerich team for calibration and traceability options. KERN 348-01 Milligram Weight (OIML M1, 1 mg, Polished Stainless Steel) The KERN 348-01 is a precision milligram weight in disk form designed for laboratory calibration and fine-balance verification in high-precision industrial and research settings OIML class M1 accuracy Nominal value 1 mg Polished stainless steel finish Disk form for stable placement Accurate calibration for microbalances and analytical balances The OIML class M1 designation guarantees a high level of metrological reliability for routine and advanced calibration tasks. With a declared nominal value of 1 mg and a tolerance of 0.2 mg, this test mass offers a verifiable reference for microbalances and analytical weighing instruments, enabling consistent results in quality control and R&D workflows. The polished stainless steel construction reduces surface contamination and supports long-term traceability when used with regular calibration procedures. Practical benefits in everyday metrology and handling The compact disk form ensures stable placement on balance pans and minimises handling errors during transfers between instruments. For environments where repeatability and minimised uncertainty are critical, the small footprint of this calibration weight facilitates rapid checks and reduces downtime. As EU type approval for test weights will not be available after 30 November 2025, a DAkkS calibration is recommended for traceable documentation and nearly equivalent legal certainty; the weight thus remains suitable for most laboratory and industrial applications requiring documented accuracy. Built for durability and consistent performance Made from polished stainless steel, the calibration mass withstands routine use and cleaning, preserving its metrological characteristics over time. The smooth surface reduces the risk of particulate adherence and simplifies inspection. Supplied as a single milligram reference, this precision test mass supports reproducible processes in watchmaking, jewellery, microelectronics and scientific laboratories where minute differences matter. The manufacturer KERN is known for precision instrumentation, and this compact reference mass complements a comprehensive calibration strategy. For reliable milligram calibration, request the KERN 348-01 through Metav Werkzeuge — Metav's Emmerich-based team can advise on DAkkS calibration and supply details at info@metav-werkzeuge.com or by phone on +49 2822 7131930 Technical data Article number: T348-A Manufacturer: KERN SKU: 348-01 GTIN: 4045761240131 Country of origin: CN Tariff number: 84239090 Facts Nominal value: 1 mg OIML class: M1 Tolerance (OIML): 0.2 mg Special features Material: Polished stainless steel Form: Disk Application: Calibration/test weight for microbalances and analytical balances Recommendation: DAkkS calibration recommended Regulatory note: EU type approval for weights not possible from 30.11.2025 FAQ What accuracy class does this test mass conform to? The KERN 348-01 milligram weight conforms to OIML class M1, providing a tolerance of 0.2 mg suitable for routine and precise calibration tasks. Is a DAkkS calibration available for this weight? A DAkkS calibration is recommended for the KERN 348-01; this calibration provides documented traceability and is suitable where EU type approval is no longer available after 30 November 2025. For which balances is this 1 mg weight suitable? The 1 mg reference is intended for microbalances and analytical balances, and is appropriate for fine measurement verification in laboratories, jewellery and microelectronics applications. How does the stainless steel finish benefit long-term use? The polished stainless steel surface of the KERN 348-01 resists contamination and is easy to clean, which helps maintain consistent measurement behaviour and reduces uncertainty over multiple uses. What form does the calibration weight have and why does it matter? Supplied in a disk form, the weight ensures stable placement on balance pans, minimises handling variability and simplifies routine checks on sensitive instruments. KERN — Manufacturer; Product origin: CN; Distributor contact: Metav Werkzeuge, Emmerich am Rhein, Germany; Email: info@metav-werkzeuge.com; Phone: +49 2822 7131930

Take advantage of the combination of OIML M1 accuracy, a polished stainless steel plate and compact plate geometry for reproducible micro‑calibrations. Order the weight directly via Metav Werkzeuge or contact our consultants for specifications and calibration options. KERN 348-02 milligram weight — OIML M1, 2 mg polished stainless steel plate The KERN 348-02 is a precision milligram weight in OIML M1 class designed for traceable calibration of analytical balances and high‑precision scales. OIML M1 tolerance 0.2 mg Nominal value 2 mg Polished stainless steel plate Compact plate form for micro‑calibration Consistent measurement accuracy for laboratory workflows The milligram weight is manufactured to OIML M1 requirements and a tolerance of 0.2 mg, which provides a reliable reference point for routine checks and adjustment procedures of analytical instruments. This level of specification supports reproducible results across shift changes and between instruments, reducing process variation. The nominal value of 2 mg is suited to fine‑range calibrations where small deviations can influence analytical outcomes; using a dedicated reference weight helps maintain instrument performance and supports quality documentation. Robust materials and handling that protect the reference value A polished stainless steel surface and flat plate form minimise contamination and facilitate careful handling during placement on balance pans. The corrosion‑resistant finish preserves mass stability in laboratory environments, while the compact geometry simplifies centring on small balance pans and minimises convection effects during weighing. These design aspects contribute to lower risk of surface damage and ensure the reference value remains stable between calibrations. Calibration pathway and regulatory note for traceability From 30 November 2025, EC initial verification of test weights will no longer be possible; therefore a DAkkS calibration is recommended for continued traceability and documented accuracy. A DAkkS certificate links the reference weight to national standards and supports audit requirements in regulated laboratories and quality control departments. For tasks requiring documented conformity and long‑term reproducibility, a calibration from an accredited laboratory ensures the weight integrates seamlessly into a calibration interval plan. For product availability, calibration options and delivery from our Emmerich warehouse, contact Metav Werkzeuge for tailored advice on the KERN 348-02 and associated DAkkS services Technical data Article number: 348-02 Manufacturer: KERN SKU: 348-02 GTIN: 4045761240148 Core specifications Nominal value: 2 mg OIML class: M1 Tolerance: 0.2 mg Customs tariff number: 84239090 Materials and features Material: Polished stainless steel Form: Plate (Plättchenform) Segment: Test weights / calibration weights Origin: CN FAQ What level of accuracy does this weight provide? The KERN 348-02 milligram weight meets OIML M1 requirements with a tolerance of 0.2 mg, making it suitable for routine checks and fine‑range calibrations on analytical balances. Is a DAkkS certificate recommended for this weight? Yes. A DAkkS calibration is recommended for the KERN 348-02 to ensure traceability to national standards and to support formal quality documentation. How should the weight be handled and stored? Handle the polished stainless steel plate with clean gloves or tweezers and store it in a dust‑free box to protect the surface and maintain the reference mass; the compact plate form facilitates careful placement on small pans. Can the weight be used for routine in‑house verifications? The 2 mg nominal mass is intended for routine in‑house verifications of fine‑range balances; for audit‑grade or regulatory tasks, combine regular checks with accredited DAkkS calibrations. Metav Werkzeuge, Emmerich am Rhein — Email: info@metav-werkzeuge.com — Tel: +49 2822 7131930 — WhatsApp: +49 170 2837271

Take advantage of precise OIML M1 accuracy and the compact 5 mg nominal value for reliable microbalance checks; the polished stainless steel plate design reduces handling wear and simplifies cleaning. Order directly via Metav Werkzeuge or consult our specialists for calibration options and application advice. KERN 348-03 Milligram weight (5 mg, OIML M1) The Milligram weight KERN 348-03 is a polished stainless steel calibration plate designed for microbalances and precision scales in laboratories and quality control environments OIML class M1 precision Nominal value 5 mg Polished stainless steel plate Tolerance ±0.2 mg Precise calibration performance for microbalances The KERN 348-03 offers OIML M1 conformity and a nominal mass of 5 mg, delivering reproducible results required for fine measurement tasks. Its specified tolerance of ±0.2 mg supports traceable adjustments and verification routines on high-resolution instruments. By relying on these measurable specifications, laboratories and workshops gain a consistent baseline for instrument drift assessment, enabling predictable uptime and reduced rework in production environments. Robust material and compact plate form for everyday handling Manufactured from polished stainless steel, the calibration plate combines corrosion resistance with a finish that minimises contamination and eases cleaning. The plate form supports secure placement on pan-type microbalances and allows controlled handling with tweezers or gloves, reducing the risk of mass alteration through fingerprints or debris. This design choice balances durability with the delicate requirements of milligram metrology, giving technicians a tangible benefit in routine weighing and storage. Calibration traceability and compliance guidance Given regulatory changes, note that first verification under the European pattern approval will not be available after 30 November 2025; for most applications a DAkkS calibration is recommended as an equivalent, traceable solution. A certified calibration report provides documented confidence for audits and internal quality systems, while periodic recalibration maintains measurement integrity. When traceability and documented evidence are essential, integrating a DAkkS-certified calibration into the maintenance plan sustains instrument reliability and audit readiness. Contact Metav Werkzeuge in Emmerich for DAkkS-calibrated units, application guidance and to secure the right calibration weight for precision tasks Technical Data Article number: 348-03 SKU: 348-03 Manufacturer: KERN GTIN: 4045761240155 Country of origin: CN HS code: 84239090 Facts Nominal value: 5 mg Tolerance (OIML): 0.2 mg OIML class: M1 Special features Material: Polished stainless steel Form: Plate Recommended: DAkkS calibration Note: EG first verification not possible after 30.11.2025 FAQ What level of accuracy does this weight provide? The KERN 348-03 is specified to OIML class M1 with a tolerance of ±0.2 mg, suitable for high-resolution balances and microbalances. Can the weight be used for routine calibrations in a QA lab? Yes, the 5 mg nominal value and M1 conformity make the calibration plate appropriate for routine checks and adjustments on precision scales and microbalances. Is a specific calibration certificate available? A DAkkS calibration is recommended for the KERN 348-03 and provides traceable documentation accepted for most industrial and laboratory requirements. How should the weight be handled and stored to maintain accuracy? Handle the weight with appropriate tweezers or gloves to avoid contamination; store it clean and dry in a protective case to preserve the polished stainless steel surface and dimensional stability. Metav Werkzeuge, Emmerich am Rhein, Germany — Email: info@metav-werkzeuge.com — Tel: +49 2822 7131930 — WhatsApp: +49 170 2837271

Take advantage of the combination of OIML M1 accuracy, 10 mg nominal value and polished stainless-steel construction for dependable microbalance calibration; order the calibration mass directly via Metav Werkzeuge or ask our consultants for DAkkS calibration options. Milligram weight 348-04 (OIML M1, 10 mg) — KERN The Milligram weight 348-04 is a polished stainless-steel calibration mass in disc form designed as a reference standard for precision microbalances and laboratory metrology. OIML class M1 accuracy Nominal value 10 mg for milligram calibration Polished stainless-steel construction Disc form for reliable weighing placement Consistent, traceable results for microbalances The OIML M1 classification and a nominal value of 10 mg provide a stable reference for routine checks and instrument verification. With an OIML tolerance of 0.25 mg, this calibration mass reduces measurement uncertainty and helps to detect drift on high-resolution balances. The precision of this mass supports reproducible processes in testing, quality control and laboratory workflows, lowering the risk of rework and improving batch-to-batch consistency. Durable design that simplifies handling and storage Manufactured from stainless steel with a polished finish, the mass resists corrosion while presenting a surface that is easy to clean. The disc form ensures stable placement on weighing pans and minimises tilt-related errors. For handling and long-term integrity, use tweezers or gloves and store the mass in a protective case to prevent contamination or surface damage. These features combine to deliver both reliability and low maintenance for everyday calibration tasks. Prepared for accredited calibration and regulatory change As the EG initial verification will no longer be possible after 30 November 2025, a DAkkS calibration is recommended for traceability and documentation suitable for most applications. DAkkS accreditation provides an auditable calibration route that documents the measurement chain back to national standards. This calibration mass is therefore a practical choice for labs and workshops seeking documented conformity and robust quality assurance procedures. For KERN-level precision and traceable milligram calibration, contact Metav Werkzeuge in Emmerich to discuss supply and DAkkS calibration options via email info@metav-werkzeuge.com or by phone on +49 2822 7131930 Technical data Article number: 348-04 (SKU) Manufacturer: KERN GTIN: 4045761240162 Core figures Nominal value: 10 mg OIML class: M1 Tolerance (OIML): 0,25 mg Tariff number: 84239090 eClass: 32120103 Country of origin: CN Materials & features Material: stainless steel Form: disc Surface finish: polished Recommended calibration: DAkkS calibration (EG initial verification not possible after 30.11.2025) FAQ What accuracy class does this calibration mass have? The calibration mass is certified as OIML M1, providing high accuracy suitable for routine checks of microbalances and laboratory scales. Is a DAkkS calibration necessary for traceability? A DAkkS calibration is recommended for traceability and documented conformity; this is advised since EG initial verification will not be available after 30 November 2025. Can this mass be used on all microbalances? The 10 mg nominal value is intended for high-resolution balances; compatibility depends on the balance resolution and manufacturer guidance—use the mass as a calibration reference within the instrument’s specified calibration range. How should the mass be handled to maintain its accuracy? Handle the mass with tweezers or gloves and keep it in a protective case to avoid contamination or surface marks that could affect the mass value. Is the stainless-steel finish corrosion resistant? The polished stainless-steel surface offers good resistance to corrosion, but sensible storage and handling practices are still important to preserve long-term integrity. Manufacturer: KERN — Address: not specified — Contact: not specified

Take advantage of OIML class M1 accuracy together with a polished stainless steel disc design and a tight tolerance of 0.3 mg for reliable, repeatable calibrations; order the weight directly via Metav Werkzeuge or ask the consultants for advice and calibration options. Milligram Weight 348-05 – OIML Class M1, 20 mg (KERN) The Milligram weight 348-05 is a polished stainless steel test weight designed for high-precision calibration of laboratory and analytical balances in the milligram range. OIML class M1 precision Nominal value 20 mg Polished stainless steel finish Disc shape for stable placement Accurate calibration for analytical balances High-precision calibration demands components that combine stability, repeatability and traceable tolerance limits. The OIML class M1 rating and a nominal value of 20 mg make this test weight suitable for fine adjustment and verification of analytical balances where milligram-level accuracy is required. The specified tolerance of 0.3 mg provides a clear, measurable acceptance criterion for calibration reports and uncertainty assessments. Explanations of tolerance and class help non-specialists understand suitability: OIML classes define maximum permissible errors for test weights, ensuring that calibration results meet recognised metrological standards and support documented traceability. Robust materials that reduce maintenance and handling risk A polished stainless steel construction delivers both corrosion resistance and simple cleaning, reducing the risk of contamination or handling marks that can affect readings. The disc shape ensures stable placement on weighing pans, diminishing tilt-related errors during measurements. These material and form choices prolong service life under regular laboratory use and limit downtime for replacement or cleaning. Where repeatability is essential, the combination of surface finish and mechanical stability translates directly into fewer retests and a more efficient calibration workflow. Traceability, compliance and the role of calibration services Manufactured by KERN, this test weight supports traceable calibration chains when paired with an accredited service. Note that EC initial verification will no longer be possible from 30 November 2025; a DAkkS calibration is recommended for most applications as an equivalent means of ensuring documented accuracy and traceability. Metav’s position as a quality filter in Emmerich ensures supply reliability and a broad product range, helping workshops and laboratories centralise procurement and maintain consistent metrological standards across instruments. Contact Metav Werkzeuge in Emmerich for DAkkS calibration and procurement of the KERN 348-05; Metav’s specialists can advise on traceability and supply—email info@metav-werkzeuge.com or call +49 2822 7131930 Technical Data Article number: T348-A SKU: 348-05 Manufacturer: KERN Material: Stainless steel Form: Disc (Plättchenform) OIML class: M1 Nominal value: 20 mg Tolerance (OIML): 0.3 mg GTIN: 4045761240179 Country of origin: CN Tariff number: 84239090 Facts Nominal value: 20 mg Tolerance (OIML): 0.3 mg GTIN: 4045761240179 Tariff number: 84239090 eClass: 32120103 Special features Polished stainless steel finish Disc shape for stable placement OIML class M1 accuracy Recommended DAkkS calibration; EC initial verification not possible after 30 Nov 2025 FAQ What is the nominal value and class of this test weight? The KERN milligram weight 348-05 has a nominal value of 20 mg and is specified to OIML class M1 with a tolerance of 0.3 mg. Is the material suitable for routine laboratory use? Yes. The item is made from stainless steel with a polished finish, offering corrosion resistance and easy cleaning for regular laboratory handling. Which calibration is recommended for traceability? A DAkkS calibration is recommended for traceable results and documented accuracy, particularly since EC initial verification will not be available from 30 November 2025. For which balances is this weight appropriate? This test weight is intended for analytical and laboratory balances operating in the milligram range where OIML class M1 accuracy is required. Who manufactures this test weight? The weight is produced by KERN and distributed with Metav’s quality assurance and supply processes. Metav Werkzeuge, Emmerich am Rhein, Germany | info@metav-werkzeuge.com | +49 2822 7131930

Take advantage of the combination of high accuracy and durable stainless steel for reliable micro‑calibration results; order the calibration mass directly via Metav Werkzeuge or contact our consultants for tailored advice. KERN 348-06 Milligram weight (OIML M1, 50 mg) — polished stainless steel The KERN 348-06 milligram weight is a polished, disc‑shaped calibration mass for precision calibration of analytical and microbalances in laboratory and workshop environments. OIML class M1 accuracy 50 mg nominal value Polished stainless steel disc Tolerance 0.4 mg Accurate micro‑calibration for sensitive instruments The polished milligram mass offers OIML M1 conformity with a nominal value of 50 mg and a specified tolerance of 0.4 mg, ensuring consistent transfer standards for fine balances. Such classification means the mass is suitable for routine calibration and verification of instruments where milligram‑level accuracy is required. The stated tolerance provides a measurable performance limit, allowing comparison against balance resolution and ensuring that the calibration mass supports traceable adjustment and performance checks. Robust construction for repeatable results Manufactured from stainless steel with a polished finish and a compact disc shape, the mass resists corrosion and surface degradation that can affect long‑term stability. The material choice reduces adsorption of contaminants and eases cleaning, while the flat form factor simplifies handling with tweezers and placement on weighing pans. These design aspects contribute to repeatable measurements and reduce the risk of damage during routine use in industrial and laboratory settings. Traceability and calibration recommendations The product is supplied as a milligram weight intended for use in calibration chains where traceability is required. Note that the EC first approval for calibration weights will no longer be possible from 30 November 2025; a DAkkS calibration is recommended and meets the needs of most applications. DAkkS calibration provides documented traceability and a calibration certificate suitable for quality systems, audit trails and conformity assessments, supporting reliable measurement processes. Practical integration into quality workflows Thanks to its small size and standardised class, the mass integrates into existing calibration procedures and quality control routines without extensive adaptations. The polished surface and clear nominal marking facilitate identification and handling during multi‑step calibration sequences. When included in regular calibration schedules, such a precision mass helps to maintain measurement integrity, reduce drift in instrument readings and support compliance with internal and external quality requirements. Order the KERN 348-06 milligram weight via Metav Werkzeuge for reliable micro‑calibration; contact our Emmerich team at info@metav-werkzeuge.com or +49 2822 7131930 for calibration and delivery guidance. Technical data SKU: 348-06 Manufacturer: KERN GTIN: 4045761240186 HS code: 84239090 Core data Nominal value: 50 mg OIML class: M1 Tolerance: 0.4 mg Special features Material: stainless steel Shape: disc (plättchen) Finish: polished Origin: CN Recommendation: DAkkS calibration FAQ What accuracy class does this calibration mass have? The KERN 348-06 is classified as OIML M1, suitable for routine calibration of analytical balances and similar precision instruments. What is the nominal value and tolerance of the mass? The nominal value is 50 mg with a tolerance of 0.4 mg, as specified for the product. Is a specific calibration certificate recommended for this weight? A DAkkS calibration is recommended for almost all applications and offers documented traceability comparable to former EC first approvals. What material and finish are used for the weight? The weight is made from stainless steel and supplied with a polished finish, designed to resist corrosion and simplify cleaning. Can this mass be used in regular workshop calibration routines? Yes; the disc‑shaped design and OIML M1 classification make it suitable for integration into standard calibration and quality control workflows. Metav Werkzeuge, Emmerich am Rhein, info@metav-werkzeuge.com, +49 2822 7131930

Take advantage of precise OIML M1 accuracy and a polished stainless-steel disc for dependable calibration workflows; combine these attributes with Metav Werkzeuge’s consultation for smooth implementation and DAkkS calibration options. Milligram weight 348-07 — OIML M1, 100 mg polished stainless-steel disc by KERN A milligram weight presented as a polished stainless-steel disc for precision calibration of analytical balances and fine metrology tasks. OIML class M1 certified accuracy Nominal value 100 mg for fine calibration Polished stainless-steel disc design Tolerance 0.5 mg for reliable results Precision that supports accountable measurements The polished stainless steel reference provides consistent mass under controlled conditions, supporting traceable results for laboratory and industrial balances. As an OIML class M1 artefact with a 100 mg nominal value and a stated 0.5 mg tolerance, this calibrated reference aids measurement reproducibility and process control. The compact disc shape facilitates safe handling and storage, while the robust surface finish reduces contamination and wear during routine use. Built for consistent calibration routines Designed for repeatable use in scheduled calibration cycles, the reference weight simplifies verification procedures and reduces downtime. The polished finish minimises surface adsorption and eases cleaning between uses, ensuring that the measured mass remains stable over successive checks. For organisations seeking consistent instrument performance, the calibrated artefact supports documented quality checks and facilitates compliance with internal quality systems and external audits. Compliance and traceability for regulated workflows The EC initial verification of calibration weights will no longer be possible from 30 November 2025; therefore a DAkkS calibration is recommended for most applications to ensure traceability and acceptance in regulated environments. The KERN-branded reference aligns with standard metrology practice and, when supplied with an appropriate calibration certificate, integrates into formal traceability chains and measurement assurance programmes. Use of a certified reference helps demonstrate due diligence in quality assurance and supports confident decision-making based on measured values. For precision-critical tasks, contact Metav Werkzeuge to request the KERN 348-07 milligram weight and discuss DAkkS calibration and implementation options from our Emmerich-based quality hub. Technical data Article number: 348-07 Manufacturer: KERN GTIN: 4045761240193 Country of origin: CN Facts Nominal value: 100 mg OIML class: M1 Tolerance (OIML): 0.5 mg Tariff number: 84239090 Special features Material: stainless steel Shape: disc (plättchenform) Polished finish Milligram weight for analytical balance calibration DAkkS calibration recommended FAQ What is the nominal value and class of this reference weight? The nominal value is 100 mg and it is specified as OIML class M1 for the KERN milligram weight (SKU 348-07). Is this weight suitable for routine calibration of analytical balances? Yes, the polished stainless-steel disc is intended for fine calibration routines and supports repeatable verification of analytical instruments. What tolerance can be expected from this weight? The declared tolerance for this OIML M1 reference is 0.5 mg, which defines the permissible deviation for calibration use. Is an official calibration certificate available for this weight? A DAkkS calibration is recommended and can be arranged to provide traceable certification for the KERN 348-07 milligram weight. Does the product require special handling or storage? Handle with clean gloves or tweezers and store in a protective case under controlled conditions to preserve the polished surface and measurement stability. Manufacturer: KERN — Address: Country of origin China — Contact: not specified

Take advantage of a compact calibration solution that combines high metrological accuracy, a robust stainless-steel design, and clear traceability — ideal for routine checks of analytical balances. Order the weight directly via Metav Werkzeuge or consult the Metav team for calibration and delivery options. KERN 348-08 Milligram Weight (Class M1) — 200 mg, Polished Stainless Steel Disc A KERN 348-08 milligram weight for traceable calibration of analytical and precision balances in laboratories and inspection benches. Milligram weight, OIML class M1 Nominal value 200 mg, high accuracy Polished stainless steel disc Reliable accuracy for routine calibration tasks The compact 200 mg mass meets OIML M1 requirements and is specified with a tolerance of 0.6 mg, providing a dependable reference for balance checks and small-scale calibrations. As a calibrated test mass, it supports documented procedures and helps maintain measurement consistency across production and laboratory workflows. The specification for tolerance communicates the expected maximum deviation, allowing straightforward integration into quality management and ISO-conformant calibration routines. Robust construction for repeated handling and stability Manufactured from stainless steel with a polished finish, the disc-shaped mass resists corrosion and surface contamination that can affect long-term stability. The material choice and surface treatment reduce adsorption of oils and moisture, helping to preserve the precision mass between calibrations. The form factor supports safe handling and straightforward placement on balance pans, reducing the risk of handling-induced errors during frequent verification cycles. Practical integration and conformity advice This test weight suits regular verification tasks, spot-checks, and comparison measurements on analytical instruments. For legal and high-assurance applications, note that initial EC verification of calibration weights will no longer be available from 30 November 2025; a DAkkS calibration is recommended for most requirements as an equivalent and recognised traceable service. The weight’s compact design and clear specification simplify documentation and storage within a calibration schedule, helping to reduce downtime and maintain measurement confidence. Contact Metav Werkzeuge for DAkkS calibration packages, local availability and delivery from Emmerich — info@metav-werkzeuge.com / +49 2822 7131930 Technical data Article number: T348-A SKU: 348-08 GTIN: 4045761240209 Manufacturer: KERN Origin: CN Facts Nominal mass: 200 mg Tolerance (OIML): 0.6 mg Special features Material: polished stainless steel Shape: disc OIML class: M1 DAkkS calibration recommended EG initial verification not available after 30 Nov 2025 FAQ What tolerance can be expected from this calibration weight? The KERN 348-08 milligram weight (class M1) is specified with a tolerance of 0.6 mg, which defines the maximum permissible deviation for routine calibration and verification tasks. Is this weight suitable for analytical and precision balances? Yes, the 200 mg nominal value and OIML M1 classification make the weight appropriate for checks and adjustments of analytical and high-precision balances. How should the weight be cleaned and stored to preserve accuracy? Clean the polished surface with a lint-free cloth and avoid chemical cleaners; store the mass in a dry, dust-free case to maintain stability and minimise surface contamination between calibrations. Does the item come with a calibration certificate? Calibration options are available; the supplier recommends a DAkkS calibration for documented traceability, which can be arranged through Metav Werkzeuge. Will this weight remain legally verifiable after 2025? Initial EC verification for calibration weights will not be possible after 30 November 2025; a DAkkS calibration is advised as the recognised alternative for most applications. Manufacturer: KERN — Address: not provided — Contact: not provided

Precise calibration for high-resolution balances is achieved with the combination of OIML class M1 accuracy and a polished stainless steel disc; reliable, low-uncertainty measurement supports consistent process control. Order the KERN 348-09 directly via Metav Werkzeuge or ask our consultants if needed. KERN 348-09 milligram weight — OIML class M1, 500 mg, polished stainless steel The KERN 348-09 is a milligram weight intended for the calibration of high-resolution balances in laboratories and industrial workshops, presented in a compact disc form for stable placement and minimal handling error. OIML M1 accuracy, tolerance 0.8 mg Nominal value 500 mg in disc shape Polished stainless steel for stability Suitable for high-resolution balance calibration Reliable accuracy for high-resolution instruments Calibration weights classified as OIML class M1 deliver the reproducible results required by precision balances and analytical instruments. With a nominal value of 500 mg and a specified tolerance of 0.8 mg, this weight supports repeatable adjustments and drift checks, reducing measurement uncertainty in routine procedures. The clear numerical specification makes it straightforward to compare against balance performance data and to document conformity during quality control cycles. Durable construction that reduces measurement uncertainty Manufactured from stainless steel with a polished finish, the disc design minimises surface contamination and facilitates easy cleaning after handling, which in turn preserves mass stability. The compact disc shape provides a low centre of gravity and consistent seating on balance pans, decreasing the risk of tilt-related errors. These material and form choices contribute directly to longer intervals between recalibrations and more consistent on-bench results. Compliance and calibration options explained Note that EC initial verification of test weights will no longer be possible from 30 November 2025; for most practical applications a DAkkS calibration is recommended as an equivalent, traceable alternative. A DAkkS certificate provides documented traceability to national standards and supports internal quality records or accreditation requirements. Selecting traceable calibration at purchase simplifies integration into existing metrology workflows and helps to meet audit expectations. For reliable, traceable calibration weights from a recognised brand, source the KERN 348-09 through Metav Werkzeuge — contact our Emmerich team for advice on DAkkS calibration and suitability for specific balances Technical data Article number: 348-09 SKU: 348-09 Manufacturer: KERN GTIN: 4045761240216 Facts Nominal value: 500 mg Tolerance (OIML): 0.8 mg OIML class: M1 Commodity code: 84239090 eClass: 32120103 Special features Material: stainless steel Form: disc shape Surface: polished Secondary article number: T348-A Origin: CN FAQ What tolerance class does this weight comply with? The weight complies with OIML class M1, with a specified tolerance of 0.8 mg, suitable for calibration of high-resolution balances. Is the weight suitable for laboratory and workshop use? Yes, the polished stainless steel disc and its stability make the weight suitable for both laboratory environments and industrial workshops where precise balance checks are required. Can this weight be supplied with a calibration certificate? A DAkkS calibration is recommended and can be provided to ensure traceability against national standards for the KERN 348-09. Why is EC initial verification no longer an option after 30 November 2025? Regulatory changes mean EC initial verification of test weights is not possible after that date; DAkkS calibration is advised as an equivalent measure for most applications. Manufacturer: KERN; Seller: Metav Werkzeuge, Emmerich am Rhein, Germany; Email: info@metav-werkzeuge.com; Phone: +49 2822 7131930

Take advantage of a lightweight, polyamide handling tool that ensures a secure grip on small calibration weights up to 200 g; its 100 mm length combines fine control with easy handling for routine calibration tasks. Order directly via Metav Werkzeuge or consult our specialists for matching accessories and delivery from Emmerich. KERN 315-242 Tweezer (Polyamide, 100 mm) KERN 315-242 is a precision plastic tweezer for secure handling of small calibration weights in laboratories and workshops Secure grip for small calibration weights Suitable for weights E1–M3, 1 mg–200 g 100 mm length for precise handling Polyamide construction, lightweight 10 g Precision handling reduces contamination and measurement error The compact design provides a controlled hold when placing and removing calibration masses, helping to preserve the integrity of sensitive components. Made from polyamide, the instrument is gentle on metallic and plated surfaces and reduces risk of scratching or marking. The compatibility with 1 mg–200 g weights across E1–M3 classes means the tool supports a wide range of calibration workflows, supplying consistent handling where repeatability matters. Built for routine use, the tweezer contributes to faster setup times and fewer handling-related deviations. Comfortable length and light weight for repetitive tasks At 100 mm, the geometry balances reach and tactile feedback to enable precise positioning without overextension of the hand. The construction results in a lightweight tool — approximately 10 g — that decreases operator fatigue during repeated handling. The slim tips facilitate access to small masses and narrow pans, while the overall form factor supports careful handling during calibration runs. Clear, repeatable manipulation of weights improves throughput and aids adherence to internal quality procedures. Durable, easy-care design for laboratory and workshop environments The choice of high-quality plastic provides a durable and easy to clean solution suitable for environments where metal tweezers could risk scratching or produce magnetic influence. Maintenance is straightforward: wipe clean and store in a dry place to maintain tip alignment and performance. The tool's simple construction minimises service requirements and offers a dependable adjunct to balances, scales and precision measuring equipment in both calibration laboratories and industrial workshops. Contact Metav Werkzeuge today for tailored advice and supply of the KERN 315-242 tweezer; our Emmerich-based team can confirm suitability for specific calibration setups and arrange prompt delivery via the central European warehouse (info@metav-werkzeuge.com | +49 2822 7131930 | WhatsApp +49 170 2837271) Technical data Article number: 315 SKU: 315-242 Manufacturer: KERN GTIN: 4045761003439 Material: Polyamide (plastic) Facts Length: 100 mm Weight: 0.01 kg Suitable weight range: 1 mg–200 g Special features Secure grip for small calibration weights Suitable for weight classes E1–M3 Lightweight construction for reduced operator fatigue Simple cleaning and low maintenance FAQ What weight range is compatible with these tweezers? The KERN 315-242 tweezer is suitable for handling calibration weights from 1 mg up to 200 g. Which weight classes can be handled safely with this tool? This tweezer supports weights across classes E1 to M3, making it appropriate for a broad range of calibration tasks. Is the material safe for delicate or plated masses? Yes, the polyamide construction of the KERN 315-242 is designed to be gentle on delicate and plated surfaces, helping to avoid scratches. How should the tweezer be maintained to ensure longevity? Routine care for the KERN 315-242 involves simple cleaning with a soft cloth and storage in a dry place to preserve tip alignment and performance. Can this tool be used in both laboratory and workshop environments? The lightweight, easy-care design of the KERN 315-242 makes it suitable for calibration benches in laboratories as well as workshop settings where precise handling is required. Metav Werkzeuge, Emmerich am Rhein, Germany — Email: info@metav-werkzeuge.com — Tel: +49 2822 7131930 — WhatsApp: +49 170 2837271

Take advantage of a simple, reliable accessory that keeps calibration masses free from dust while preserving accuracy and prolonging service life. The combination of gentle bristles, low weight and practical handling ensures efficient routine maintenance of scales and weights. Order the KERN brush directly via Metav Werkzeuge or consult our advisors for further details. KERN 318-270 Dust Brush — compact brush for gentle cleaning of calibration weights The KERN 318-270 dust brush is a lightweight accessory designed to remove dust and particles from calibration weights and weighing surfaces in laboratories and workshops. Soft bristles for gentle cleaning Designed for calibration weights Lightweight and easy to handle Preserve measurement accuracy with gentle, targeted cleaning Regular cleaning of calibration masses prevents contamination that can alter mass values and affect the repeatability of results. The compact brush offers gentle bristles that remove dust without abrading surfaces or leaving residues, helping to maintain the precision of weights used in verification and calibration. For technicians and workshop teams, this reduces the frequency of recalibration and supports consistent measurement quality across production and quality-assurance processes. Practical handling for routine maintenance and quick interventions The accessory is intentionally lightweight and easy to manoeuvre during daily maintenance tasks, enabling swift removal of particles from weight stacks and pans without disassembly. Ergonomic handling minimises the risk of accidental knocks or slips near sensitive balances, while the brush design supports access to small grooves and recessed areas. This results in faster cleaning cycles and less downtime, contributing to a more efficient workflow in busy metrology environments. Reliability in supply and fit for professional environments The brush is supplied by a recognised manufacturer for weighing technology and suits workshops, service departments and calibration laboratories that require straightforward maintenance tools. Paired with Metav Werkzeuge’s role as a dependable distributor, this accessory supports a transparent supply chain and practical on-bench readiness. Investing in simple, purpose-built maintenance tools safeguards the performance of weighing equipment and complements broader quality-management measures. Contact Metav Werkzeuge to procure the KERN 318-270 dust brush for dependable maintenance of calibration weights or to request additional technical information Technical data Article number: 318 SKU: 318-270 Manufacturer: KERN GTIN: 4045761004146 Facts Weight: 0.01 kg Eclass: 21041109 Special features Suitable for cleaning calibration weights Rapid dispatch available via distributor FAQ How does this brush protect calibration accuracy? The brush removes dust and particles that can adhere to masses; using the KERN 318-270 dust brush helps maintain the declared mass values and stable measurement results. Is the brush suitable for all types of laboratory weights? The brush is intended for routine cleaning of calibration weights and standard weighing pans; compatibility with specialised mass geometries should be assessed case by case. Can the brush be used on balance pans without causing damage? Yes, the soft bristles are designed for gentle cleaning and avoid abrasive contact that could harm pans or plated surfaces. Manufacturer: KERN — Address: not specified — Contact: not specified