... manufacture, we supply you carbon steel ball, chrome steel ball and stainless steel ball, Place of OriginShandong, China (Mainland)Brand NameModel Number1 ... /32", 3/16", 7/32", 1/4", 4mm, 5mm, 6mmapplicationbicyclematerialcarbon steel ballsize : 1/8" , 5/32", 3/16", 7/32", ... G500, G1000HardnessHRC60ApplicationCycle industryPlackingBulk packing,pounch packing,plastic/tin box packing bicycle steel ball