UL Listed NEMA 6-20 Plug Male to 6-20 Receptacle (6-15 Receptacle) Female. Used 12 AWG stranded copper inner wire for loading 20 AMP, 250 Volts, 5000 Watts. Pins and terminals are made with nickel-plated brass to prevent oxidation rust. 100% copper wire conductor inside Heavy-duty power adapter cord. Length: 2, 3, 6, 10, 16, 25, 50,100FT (Feet)