... 316. 2.Process:investment casting. 3.Certification:ISO9001. 1/2"-6" stainless steel quick couplings.Description: Welcome international order ,please ... ”,1 1/2”,2”,2 1/2”,3”,4”,5”, 6”MediumSteams, Gases, Liquids, Viscous or corrosive mediumMATERIALASTM A351,CF8 ... TS1649:2002, GB/T19001 and GJB9001A-2001Quality ControlWe have a full set of quality control systems to guarantee the best product quality. ...