UL & cUL Listed Industrial 3-prongs Electric Range 10-50 extension cord 50 AMP 250 Volt. STW 6AWG/3C stranded wire extension cord, support max 50 AMP loading, Max Rate 12500 Watt (250V). Molded with electroplate copper terminal in order to avoid surface oxidation effectively. Used STW cable for outdoor PVC jacket, Heavy-duty for Welder, 100% copper conductor inside. Universal to All Other Brands 10-50 3-pole plug of equipment. Four choices of length: (3 feet, 20 feet, 36 feet, 50 feet) Color: Black