... . High - speed, low noise special bearing 4. Ball valves for liquid and gas ect 7/32" Series steel ball retainer with chrome steel ball size7/32 ... :Manufacturer, Trading Company, Distributor/Wholesaler Product/Service(We Sell):Steel Ball,Ball Retainer,Stainless Steel Ball,Coloured Steel Ball,Carbon Steel Ball,Ball Bearings Registered Address:Weizhuang, Huangji Township, Yuncheng County ...