GRAM M1 CR precision weights are machined in chrome-plated steel to deliver OIML M1 class accuracy, with a maximum permissible error of just ±50 mg at a nominal value of 1 kg. This class makes them the right choice for traceability of M2 and lower-class weights, and for verifying weighing instruments of OIML accuracy class II — covering the calibration needs of precision balances and laboratory-grade scales. Built to withstand daily handling in industrial, laboratory and calibration environments, each weight holds its certified mass over time — the stable reference point that keeps every weighing result trustworthy. Optional M Class traceability certificates (up to 2 kg, and for 5, 10 and 20 kg) add documented proof of accuracy, while the dedicated 5 kg and 10 kg weight handlers make safe, ergonomic handling part of the standard routine.