1.High-quality stainless steel ball 1.ISO9000,SAE standard 2.many dimentions&materials long life,high precision 3.OEM Place of originShandong,ChinaMaterialsbearing ... , grinding materials, micro mists, polishing, decoration, toys, military industry, meters, automobiles, motorcycles, bicycles, household appliances, chemical machinery, light textile machinery, food machinery and mining machinery ...