Replacement Parts 5mm Diameter Bike Carbon Steel Ball Bearing Drawer Rails, Skates, Roller Conveyors, Castors, Locks, Bearing Units. Utilized in Burnishing Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre:7.84mm AISI1010-AISI1015 Automotive Bearing Carbon Steel Ball for Bicycle Parts G100 G200 1.965g Next:G100 G500 G1000 18mm 16mm 20mm Solid Iron Ball Carbon Steel Ball for Bicycles