... .8mm 4.Hardness:HRC58-62 AISI1010,AISI1015,AISI1045,AISI1086 high precision Carbon Steel ball 1.Materials:(AISI E52100,100Cr6,SUJ2)+(100CrMn6,SUJ3) ... 15days .6.Packing : We pack our balls using steel pallet or plywood pallet in our export business :(1 ... products are widely used in aviation industry,automobile industry,precision instrument,measuring appliance, motorcycle, bicycle,bearing,medical ...