OIML Precision Weights that conform to the standards of the Organisation Internationale de Metrologie Legale International Recommendation (OIML R 111). They are manufactured from the finest stainless steels available including Alloy 8 Stainless Steel that has low magnetic permeability, uniform consistency and high resistance to corrosion (weights below 10mg are constructed of aluminium). The weights are individually identified and supplied in a plastic box. They are suitable for the calibration, adjustment, and checking of all types of balances and scales.