The 6 AWG 6-50 welder extension cord is built for the extreme demands of the welding industry. The cord is constructed of copper conductors which is the industry standard for good conductivity with low power loss. The insulation is flame retarded and also provides protection for the copper wires and the user. The international safety standard makes the cords safe for industrial and commercial welding. These extension cords have been used worldwide and are the safe choice for welding.