3.5mm dc jack 1.copper rod (59%),ABS plastic (plus fiber 15%) 2.ROHS certificate 3.DC power male parent to ... plug connecti stero copper shell female socket, 3.5mm dc earphone jack scket Dc socket are widely used in all ... for 5.5 DC power-supply, DC plug, DC jack, RCA jack, MiNi pin, RCA connecting plugs, MiNi USB plugs, ... plugs, AC plugs, DC plugs and earphone plugs 3.5sp jack,dc jack,dc socket