The GRAM F1 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 F1 class accuracy — a maximum permissible error of just ±5 mg at a nominal value of 1 kg. This class makes it the right choice for traceability of F2 and lower-class weights, and for verifying weighing instruments of OIML accuracy class I, including the calibration of high-accuracy class 2 balances. 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.