Feature●Product Type :Lab Supply●Grinding Ball Stainless Steel, Made Of C Stainless Steel, Suitable For Grinding Extra Large Or Tough Samples●Package Quantity :1●Country Of Origin :United StatesDescription Grinding Ball Stainless Steel, made of C stainless steel, Suitable for grinding extra large or tough samples in the Geno/Grinder, For grinding large or tough samples in titer plates and Vial Sets, Autoclav