These solid cast iron test weights are manufactured to class 5 tolerances.
NIST traceable weight calibration certificates are available.
Field standards for testing industrial devices-Class III, Class IIIL, or Class IIII
Testing for non-marked scales without class designation
Verifying scales are within specified accuracy and tolerances
Cast iron grip handle construction
Nominal value marked on weight
Weight capacities up to 20lb/10kg meet Handbook 105-1 and Handbook 44 requirements
Serial numbers may be stamped on weights (optional)