... . Grade: G100-G30004. Hardness (HRC):HRC58-655. Application: Bicycle, bearing, pulley, slide, handcraft, shelf, luggage, hardware, ... and finger pump, bearings, and electronic components6. Standard: GB/T-308-2002, GB/T1148-93Production process of Stainless Steel Ball ... , Lapping2, Inspection, Packing.Packing information of Stainless Steel Ball:Oily packing in pouch packing, plastic/tin box packing1 ...