1,hatch-cover chain 2,material,20Mn2,20Mnv,25Mnv Materialinsidelengthinsidewidthproof testloadbreakingloadweightMMMMMMKNKNKG/M11 43 ... 97 194 4.32 15 42 21 106 212 5.20 16(A) 55 22 128 254 5.34 16(B ... 19 57 24 164 330 7.60 20(A) 60 22 129 359 9.50 20(B) 62 22 179 359 8 ... 108 35 399 798 18.221,The name of product:hatch-cover chain2,Material:20Mn2,20Mnv,25Mnv3,Surface:hot-dipgalvanize4,Certificate:ABS ...