... Grade:G5-G1000 3.size:0.5mm-50.8mm 4.Hardness:HRC58-62 AISI1010,AISI1015,AISI1045,AISI1086 high precision Carbon Steel ball ... 1.Materials:(AISI E52100,100Cr6,SUJ2)+(100CrMn6,SUJ3)2,Grade:G5 G10 G16 ... products are widely used in aviation industry,automobile industry,precision instrument,measuring appliance, motorcycle, bicycle,bearing,medical ...