1,hatch-cover chain 2,material,20Mn2,20Mnv,25Mnv Materialinsidelengthinsidewidthproof testloadbreakingloadweightMMMMMMKNKNKG/M11 43 ... 15 42 21 106 212 5.20 16(A) 55 22 128 254 5.34 16(B) 55 18 128 254 5 ... 35 399 798 18.221,The name of product:hatch-cover chain2,Material:20Mn2,20Mnv,25Mnv3,Surface:hot-dipgalvanize4,Certificate:ABS ...