... Grades: G100, G200, G500, G1000 Materials: Carbon steel, Chrome steel, Stainless steel, Copper, Aluminum Complying with GB, ASTM, DIN, JIS standards ... machinery and mining machinery, etc. Packing: export carton, steel drum;According to customers' requirements. [sweet hint] By ... fabic aluminum silver pulp industry, fully fungible bearing steel ball. This product has high strength, fatigue resistance ...