the company is JINAN SINAI CASTING FORGING CO .,LTD IN CHINA we are a professional manufacturer and supplier of grinding media..The quality of steel balls is very well regarded by their customer.our product is exported to korea,japan south america,south africa and europe.besides large cement manufactures,fire power house mangers and mine owners have highly praised our products.Our grinding steel balls have the advantages of rubbing endurance,crashing tolerance and roundness persistance,compared to other products in this field.