... :ISO9001:2008 size:1/16"1/8"3/16"1/4"5/16" Bicycle steel ball is one of the main ... . Bicycle Steel Ball Information Products namecarbon steel ballsBrand nameZRGQSeries 1/4, 1/8, 3/16, 5/16, 5/32, 3/8 ... ,7/8, 3/4 and so on.ID size0.5mm-50mmCage materialAISI-1010-1020 ... various types of steel balls of various specifications bicycle spare part steel ball