1.High-quality stainless steel ball 1.ISO9000,SAE standard 2.many dimentions&materials long life,high precision 3.OEM Place of originShandong,ChinaMaterialsbearing steel(GCr15/GCr15simn ... mining machinery, etc.Packing: export carton, steel drum;According to customers' requirementsPackageAccording to your needQuality StandardISO9000,SAE 0.8mm-250mm High-quality stainless steel ball