We are professional manufactory produce steel ball, our products are including all kinds of types, materials metal ball: stainless steel ball, steel ball, copper ball, iron ball, etc. we own advanced technique and professional instruments. We will try our best to apply high quality product to our customer. Welcome to visit our net page. Our source material: .AISI1008~AISI1018, AISI1045, AISI1065~AISI1086 Spec:3mm-----30mm Level: G40---G1000