... -3,Hpb59-3,CW614n,CW617n, CuZn39pb3,,CuZn40pb2,CW3770,DZR. Stem Brass Stem, Brass as above. Sealing PTFE/TEFLON,VITON,O-RINGS. Handle Iron ... ,Oil,Gas,etc.6.Size: 1/2''----4''.7.Surface: Brass yellow.8.Standard: GB,DIN,ANSI,EN,BS,UIN,JIS ... Production to ensure the Delivery and Quality!We smelt the brass bars,make the hot forging,machining and CNC processing,assembly ...