... bearings 4.1/4" x 6/7/9/11 size ball retainers for bicycle parts,bearing cages,copper,nickle plated retaining rings ... :1. General industry for automobile, motorcycle, bicycle manufacturing, special bearings & micro – ball for the electronics industry. 2. High ... Retainer,Stainless Steel Ball,Coloured Steel Ball,Carbon Steel Ball,Ball Bearings Registered Address:Weizhuang, Huangji Township, Yuncheng ...