Material:Stainless Steel Product Name:High Quality 1 Inch 2 Inch 3 Inch 4 Inch Corbon Steel Ball Grade:G10~G1000 Size:0.3 - 1200 mm Material:Carbon steel Surface:Bright Certifications:ISO SGS ROHS Hardness:HRC 50-55 Feature:Anti-wear Package:Plastic Bag + Cardboard Box + Wooden Show More