... to 50.8mm 3.Grade:G10 to G1000 420 Stainless Steel Ball Specification Material:420 stainless steelDia:0.3mm to 50 ... ,G40,G60,G100,G200,G500,G1000Application:motorcycle accessories,pulleys,stainless steel bearings,plastic bearings,crafts,values,oilPackage: poly bags,box and carton ...