... .8mm 4.Hardness:HRC58-62 AISI1010,AISI1015,AISI1045,AISI1086 high precision Carbon Steel ball 1.Materials:(AISI E52100,100Cr6,SUJ2)+(100CrMn6 ... G10003.Size:2mm-50.8mm,1/8",1/4",3/16",5/16",5/32",3/8"4, ISO9001-20085.Delivery time ... .Our products are widely used in aviation industry,automobile industry,precision instrument,measuring appliance, motorcycle, bicycle,bearing,medical instrument and food ...