... 4 pole dc audio plug 1.Materials: copper rod (59%), POM plastic (POM-450 Japan) 2.ROHS certificate copper rod,4 ... .2mm,nickel plated white plastic,3.5mm 4 pole dc audio plug Product advantages: 1.Materials: copper ... to 5.0 mm range barrel diameter 4. Save under room temperature in dry area ... , MiNi female mould, power-supply connecting plugs, audio plugs, video plugs, transferring plugs, switching plugs, ...