1.For multilayer pipe, 2.Material is CW617N&CW602N, 3.SUS304 S/S sleeve 4.Size ... ,stainless steel SUS 304 sleeve and plastic ring.Brass body material can be CW617N, CW602N, Hpb59-1, Hpb58-2, Hpb58-3 ... different sections according to diferent product-----heating these sections in intermediate frequency furnace-----hot stamping-----cutting burr-----shot blast and shot ...