... ,CuZn40pb2,CW3770,DZR.Ball: Brass as above,lead free brass,Brass ball.chrome coated,Iron ball chrome coated.Stem : Brass Stem, Brass as aboveSealing : PTFE/TEFLON ... Gas,etc. 6.Size:1/2'' 7.Surface: Yellow brass color,Nickel plated, Chrome plated 8.Standard:GB,DIN,ANSI,EN,BS,UIN ... processing,assembly,pressure test and packing,etc,all by ourselves.With the advantage of one stop production service,we are ...