... Hardness (HRC):HRC58-655. Application: Bicycle, bearing, pulley, slide, handcraft, shelf, luggage, hardware, grinding media,Valve, aerosol ... T-308-2002, GB/T1148-93Production process of Stainless Steel Ball:Drawing, Heading, Flashing, Heat-treatment, Grinding, Lapping1, ... Lapping2, Inspection, Packing.Packing information of Stainless Steel Ball:Oily packing in pouch packing, plastic/tin box packing1, ...