1.3/16 bearing balls used for bearings 2.Hardness:HRC58-61 3.High precision, ... 3/16 inch ,4.763mm ball bearing steel balls,used for bearings ABEC-1,P0 high precision ,good quality ,fast ... High - speed, low noise special bearing 4. Ball valves for liquid and gas etc.8)packing:inner packing:plastic bag ... /box for one gross outer packing:caton or steel drum inner ...