... 6mm Grades: G100, G200, G500, G1000 Materials: Carbon steel, Chrome steel, Stainless steel, Copper, Aluminum Complying with GB, ASTM, DIN, JIS ... food machinery and mining machinery, etc. Packing: export carton, steel drum;According to customers' requirements. [sweet hint] By our ... in hardness, crushing load etc., can achieve the equivalent to bearing steel ball standard. However, its price is far below ...