... Brass:Hpb57-3,Hpb593,CW614n,CW617n,CuZn39pb3,CuZn40pb2,CW3770,DZR.Ball: Brass as above,lead free brass,Brass ball.chrome coated,Iron ball chrome coated.Stem : Brass Stem, Brass ... Nut : Brass nut,Steel nut,Iron nut,all Zinc plated. Connection : Theaded ISO228,BSP,NPT,UNION.3.Technics: Forged, Chrome plated ... ensure the Delivery and Quality!We smelt the brass bars,make the hot forging,machining and CNC ...