1/8" 3.175mm carbon steel ball aisi 1015 1)High hardness(60-65HRC) 2)Good wear resistance 3)NO breakage 4)100%original ... with the GB,AISI, DIN, and JIS standards5) Applied for all kinds of hardwares, bearings, wheels, bicycles and toys, chemical,griding ... media,polish and military related applicationsAs one of the leading manufacturers of steel balls with 15 years' experience, we are ...