Lincoln Electric Magnum Pro External Dress Robotic Gun with 4' cable length features high quality copper inner tube that enhances electrical conductivity. Air-cooled Gun operates at 550 A with CO2 gas at 100% duty cycle. It accommodates wire size ranging from 0.035 - 5/64". Gun tube has aluminum jacket that resists spatter and offers durability. It features single tool center point and robust cable design. HexConnect torch bushing assures better electrical conductivity through full face contact as opposed to rotating connections that have single line contact. Mounting bracket design helps to optimize clearance for tough to reach welding applications.Amperage:550 Amps Cable Length:4 ft. Duty Cycle:100% with 100% CO2 Wire Size Range:0.035 - 5/64"