We are Qingdao Fortune Anchor Chain Co Ltd, we are one of the Chinese largest mooring chain manufacturer, we can supply the anchor chain, mooring chain, stud link chain, marine chain, cast iron sinker, oval cast iron sinker, the chain's diameter is from 16mm to 132mm of Grade2, Grade3 level. Our cast iron sinker basic weight is from 1T to 10T of each pce. Pls contact with us  mooringchain at yahoo dot com