We are Qingdao Fortune Anchor Chain Co Ltd, we are Chinese largest anchor chain manufacturer, our products include anchor chain, mooring chain, stud link chain, marine chain, buoy chain etc and the chain's diameter is from 16mm to 152mm of Grade1, Grade2 and Grade3 level. We can supply the quality certificates as ABS,BV,CCS,DNV,GL,RS,LR,RINA  etc  Pls contact with us  qdyingxin at yahoo dot cn