Heavy-duty for Welder, 100% copper conductor inside. Welder 3-prongs NEMA 6-50 lighted connector right-angle, 50 Amp / 250 Voltage. STW 8AWG/3C stranded wire extension cord, support max 40 AMP loading, Max Rate 10000 Watt (250V). Pins and terminals are made with nickel-plated brass to prevent oxidation rust. Universal for all other brands 6-50 Welding Machine 3-pole connector.