General lifting chain: 1.Quality grade:G80,G100 2.safety factor :min.4 3.Manfacture :ISO,DIN,BS,JIS,ASTM 4.MATERIAL :ALLOY General lifting chain :1.Material :High quality alloy steel2.Surface treatment :self-color ,polishing ,blackened,painted ,plastic coating ,hot-dip galvanized ,electric -galvanized3.Manfacture :ISO,DIN,BS,JIS,ASTM4.Safety factor :min.45.Quality grade:G80,G1006.Non-standard ...