... resistant, heat preservation 3.customize for you butterfly handle gas ball valve1.Model No. : XLD-1119 2.Material:Body Brass ... ,CW617n,CuZn39pb3,CuZn40pb2,CW3770,DZR.Ball: Brass as above,lead free brass,Brass ball.chrome coated,Iron ball chrome coated.Stem : Brass ... the brass bars,make the hot forging,machining and CNC processing,assembly,pressure test and packing,etc,all by ourselves.With the ...