NEMA 6-20 Plug Male to 6-20 Receptacle (also support 6-15 Receptacle) Female. 250 Volts, 5000 Watts. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. Used SJTW 12 AWG wire support max 20AMP loading. 100% copper wire conductor inside Heavy-duty power adapter cord. Length: 3 Foot.