... steel Surface:blackened Proof Coil Chain ASTM 80/G30 We can supply various kinds of chains,commercial chains,high tensile chains or as ... ,electro galvanized,PVC coated or as you required.Grade:G30,G43,G70,G80,C100Manufacture Standard:ISO,DIN,BS,JIS,ASTMWe can ... also make the non-standard chain according to your requirements. Proof Coil Chain ASTM 80/G30