... carbon steel ball, chrome steel ball and stainless steel ball, Place of OriginShandong, China (Mainland)Brand NameModel Number1/8" , 5/32", ... 4", 4mm, 5mm, 6mmapplicationbicyclematerialcarbon steel ballsize : 1/8" , 5/32", 3/16", 7/32", 1/4", 4mm, 5mm, ... 6mm MaterialAISI 1010-1015, AISI 1055, AISI1085Size1/8" , 5/32", 3/16", 7/32", 1/4", 4mm, 5mm, ... packing,plastic/tin box packing bicycle steel ball