Stainless Steel Ball 1.Low price & High Hardness 2. OEM service accepted 3. Low noise &wear ... etc3. Grade: G100-G30004. Hardness (HRC):HRC58-655. Application: Bicycle, bearing, pulley, slide, handcraft, shelf, luggage, hardware, grinding media,Valve, ... /T-308-2002, GB/T1148-93Production process of Stainless Steel Ball:Drawing, Heading, Flashing, Heat-treatment, Grinding, Lapping1, Lapping2, Inspection ...