Features: 1) Big size wheel 2) Materials: steel, carbon and stainless steel 3) Weight: no more than 15t 4)30years in field ... of serving you soon. Material: Forged Carbon Steel, Stainless Steel , Duplex Stainless Steel , Low Alloy Steel(Like A105,LF2,LF6,F6a,F304,F316,F22 ... 4:1Packing:in polywood Suitable to sea shippment railway stainless steel wheel