... 1)Material:ductile iron 2)Standard:ISO2531 3)Length:6M ductile iron pipe1) The standed:ISO2531-1998,Class:K8,K9(2) Effective length:6M ... -DN1200mm(6) T-type(7) High strength ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance,easy fixing ... /E Co.,Ltd. You will get our quick reply! ductile iron pipe