... details :1, Spec:D20,D25,D32,D40,D50,D63;2, ISO9001:2008 quality system certification 4.Competitive price, superior quality, best service ... strictly according to national and internaional standard,and we take a test on every pipe before delivered out. If you want ... give you lowest price below market one,and we have a policy that “ for saving time and absolutely honest business attitude ...