... -3,CW614n,CW617n, CuZn39pb3,,CuZn40pb2,CW3770,DZR. Stem Brass Stem, Brass as above. Sealing PTFE/TEFLON,VITON,O-RINGS. ... ,etc.6.Size: 1/2''----4''.7.Surface: Brass yellow.8.Standard: GB,DIN,ANSI,EN,BS,UIN ... is our Advantage.One Stop Production to ensure the Delivery and Quality!We smelt the brass bars,make the ... ,all by ourselves.With the advantage of one stop production service,we are able to ensure the ...