... 3/16 inch ,4.763mm ball bearing steel balls,used for bearings ABEC-1,P0 high precision ,good quality ,fast delivery ... hardness.7)Using:1. General industry for automobile, motorcycle, bicycle manufacturing, special bearings & micro – ball for the electronics industry.. 2. High accuracy ... and gas etc.8)packing:inner packing:plastic bag/box for one gross outer packing:caton or steel drum inner packing ...