Optima Scale Mfg Inc develops and manufactures a complete line of the finest laboratory balances commercial and industrial scales load cells and electronic weighing instruments Our name has stood for accuracy reliability and competitive prices Features . OIML Class M2 Test Weight. Carbon Steel with Chrome Finish. Flat top allows for stacking. Certificate Not Supplied. Suitable for general laboratory commercial and educational use Specifications . Weight Capacity 500 g. Material Stainless Steel