Special steel ball accessories for automobile 1) Size: 1.0mm-250mm 2) Grade: G10-G1000 3) Hardness: HRC58-63. 4) General Application: Bearings, Automotive, Castors, Locks, Drawer Slides, Welding, Capabilities decorative, bicycle parts, light-duty, hardware, toy and etc. Model: AISI1010, AISI1065, AISI1085 Standard: 0.5mm-250mm Productivity: 120tons/month