... chains: 1.Material: 25Mnv, 20Mn2, Q235 2.Finish: blackened, zinc-plated, HDG 3.Size: 4mm-32mm alloy steel chains Introduction:We ... G80, G70, G60, G43, G30 alloy steel chains2) Surface treatment: Self color, black oxide, electro galvanized, hot dip galvanized, black painted ... productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Grade 80 Alloy Steel Chains With Zinc Plated/Black Oxide