1. Material: Carbon Steel, Stainless Steel, Alloy Steel, Color Metal etc; 2. Process: Investment casting & lost wax casing; 1 ... . Material: Carbon Steel, Stainless Steel, Alloy Steel, Color Metal etc;2. Process: Investment casting & lost wax casing;3 ... .4. Excellent Quality Control, Good Price. Fast Delivery! Gear used for railway&transport&railway tank,hopper,flat,wagon&train&freight ...