... .en.alibaba.com http:www.syjmg.comIteamHigh quality seamless steel pipeTechinqueCold drawnStandardASTM,DIN,GBMarterial10#,20#,45#,16Mn,Q345,30CrMoSpec ... 6mmDeliveryconditions BK ,BKS, NBK ,BKW GBKApplicationStructure,transport gas and oil, making machine part,extCertificationISO9001-2008,API Spec 5CTPackingBundles or ... our product pls do not hesitate to contact us cold rolled seamless steel pipe