Carbon steel ball applied for all kinds of hardwares,bearings,wheels,bicycles and toys,chemical and military related application material:AISI1008-1020,AISI1045-1085 size:0.5-50.8mm grade:G40,G60,G80,G100,G200,G500,G1000 hardness:60 Our products complying with the ISO,AFBMA,DIN standards.