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 ... .The side with SUS304 sleeve can connect the same size pipe by pressing of jaw,after installation, it can be seen ...