300 g and 500 g Range, Calibration Weight Set, ASTM Class 1

Key Highlights

• Designed to meet ASTM E617-23 specifications for Class 1 tolerance.

• Crafted from polished stainless steel for durability and corrosion resistance.

• Supplied as a single, serialized set with nominal values marked on weights.

• Ideal for calibrating Class I and Class II analytical and precision balances.

• Available in custom build-to-order configurations to match specific requirements.

These Rice Lake calibration weight sets represent a cornerstone of measurement integrity in laboratory and quality control environments. Manufactured from high-density stainless steel (7.95 g/cm³) and finished to a precise polish, each weight is engineered for minimal air buoyancy effects and long-term stability. The sets are supplied with the serial number applied to the rugged, protective case, ensuring full traceability for your quality records in accordance with ASTM standards.

Primary applications span from the routine calibration and verification of high-precision Class I and II balances to serving as a known reference for testing ASTM Class 4, 5, and 6 weights. Their reliability makes them equally suited for rigorous student laboratory use, rough weighing operations, and critical tolerance testing protocols. For specialized needs, custom set configurations can be built to order. Sets with a largest weight of 500 g are housed in a precision-machined, polyvinyl crush-resistant case for secure storage and transport.

Take the next step in securing your measurement accuracy. Contact our team today to request pricing, confirm availability, or speak with a calibration specialist for your laboratory or metrology requirements.

Free Shipping: Available across 48 continental USA. Extra charges may apply for residential, farm, or rural areas.
Express Shipping: Overnight and faster shipping options available at additional costs. Quotes obtainable via email.
Delivery Time: Typically 5 to 7 business days, varying by location and external conditions.
Tracking Information: Provided via email upon shipment. Accessible through account login. Additional information available upon request.
Return Policy: 15-day return period for unused, original condition products. A 25% restocking fee applies. Buyer covers original and return shipping costs.
Customer Support: Contact at (844)-735-5386 or info@selletonscales.com for queries or concerns about shipping.