PROINTxp 100 Gram Standard Calibration Weight, Chrome Calibration Weight for Digital Scales Chrome standard calibration weight 100 gram (3.527 oz) High performance OIML Class M1: 100g  0.005g calibration weight offers a wide range of adjustment and testing calibration use. Flat top allows stacking. Sold in individually packed To calibrate digital scales to ensure most precise weighing and best performance for professional or high precision needs.