... quality iron,such as 1022,1018,1010,1008,1015...Medium carbon steel are 35k,45#,10B21,1035,CH38F,1039,40ACR...Alloy ... will be packing as per the customer's requests .additional process Washer assembly,Heat treatment,Baking hydrogen,Anti-slipping patch can be ... proceeded if customer need 2.Why should you choose ...