Used UL 62 STW 10AWG*3C stranded copper inner wire, support max 30 Amp loading 7500 Watts. Industrial Welding Machine 30 Amp / 250 Voltage. 6-30P male plug to 6-30R female*2. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. 100% copper wire conductor inside, Heavy-duty power adapter cord for 6-30 outlet. Length: 24 inches (2 Foot), Color: Black