1,hatch-cover chain 2,material,20Mn2,20Mnv,25Mnv Materialinsidelengthinsidewidthproof testloadbreakingloadweightMMMMMMKNKNKG/M11 43 12. ... 35 399 798 18.221,The name of product:hatch-cover chain2,Material:20Mn2,20Mnv,25Mnv3,Surface:hot-dipgalvanize4,Certificate:ABS ...