Zhangqiu Ruinian casting and forging co(steel ball), Ltd is a professional company in producting steel ball, grinding media, forged steel ball, grinding steel ball, grinding media ball, grinding ball in China. Grinding balls are mainly applied in mines, power station, cement plants and chemical fields. The steel balls made by us are of high hardness, even wearing, good wearing resistance, no breakage, which can really reduce the cost for customers. The sizes are available from DIA20-150MM, which are strictly manufactured as standard YB/T091-2005 grinding ball, which are exported to Japan, Korea, Australia and other countries and regions and obtained high reputation.