The GRAM M1 Inox Case brings together a full set of stainless-steel precision weights, from 1 g to 2 kg, for calibrating and verifying balances with OIML M1 class accuracy — a maximum permissible error of just ±50 mg at a nominal value of 1 kg. This class makes it the right choice for traceability of M2 and lower-class weights, and for verifying weighing instruments of OIML accuracy class II. Each case is built around a specific capacity, so the exact set of denominations you need is always at hand, protected and ready for use in laboratory, workshop or calibration environments. 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.