3.5mm 4 pole dc audio plug 1.Materials: copper rod (59%), ... length 24.2mm,nickel plated white plastic,3.5mm 4 pole dc audio plug Product advantages: 1.Materials: copper rod ... connecting plugs, MiNi USB plugs, earphone sockets, RCA sockets, AC connecting plugs, Big-size Din, USB sockets, MiNi female ... sockets, male plugs, female plugs, tuning-fork plugs, AC plugs, DC plugs and earphone plugs.3.5 DC PLUG ...