... DN15, DN20, DN25, PEX coupling 16mm forged brass CW614, CW617n Brass forged PEX pipe fittings, coupling, A-8608, threaded ... gas supply system Material optional: brass (HPb57-3A, HPb58-3A, HPb59-1A or customized brass rod, steel, ironProcess: cold cut, ... hot forge,Surface Treatment: nickle, chrome, brass natural, zinc, HDGConnection type ...