... :Alloy steel :20MnTiB ,40Cr ,42CrMo Class :8.8, 10.9,12.9 ,GR.2,GR.5,GR.8,A325-1,A490-1 ... green galvanization ,Black galvanization ,Steam Black ,Ash phosphorus ,Brass , Nickel plate ,Chrome plate ,Heating galvanization ,Zinc plated(yellow, black, green)Packing: 1) Bulk ...