Mainly supply : stainless steel ball (440C ,430 ,420 ,316L ,304 ) , carbon steel ball ( 1015, 1045 and 1085 ) , bearing steel ball (GCr15 ) , copper brass ball , glass ball , titanium ball , flying saucer ball , polishing and grinding ball , plastic ball , and other kinds of hard alloy balls . We produce according to the GB308-2002 standard and measure up to the international standard of ISO9001:2008 , AFMBA1989 and DIN5401-93 . We have the ability to provide many kinds of steel balls, of which accuracy range is level G10-level G1000. The brand "Scole" is trusted deeply by customers. Our products have been widely applied in the hardware goods form a complete set for the aviation and spaceflight industry, automobiles, sprayers, stainless steel bearings, and handicraft and precision instruments. We have advanced production equipment and consummative instruments. We use perfect equipment to detect the roundness, libration size and the quality of the surface of steel balls. Have sold to more than 90 countries on the 5 continents.