Material:Stainless Steel Products Name:China High Performance 3mm Diameter customize Stainless Steel Balls Feature:Strong Rust Resistance Hardness:HRC 58-62 Size:0.1 - 1200 Mm Surface:Zero Defect Grade:G3 - G1000 Application:Bearing Accessories Package:Plastic Bag + Cardboard Box + Wooden Certifications:ISO 9001:2008 SGS Standard:DIN AISI GB