The Klutch 150 10ft. Spoolgun is specially designed for MIG welding aluminum on Northern Industrial Welders models MIG250S, MIG140Si and MIG/Stick 220Si sold separately. Holds a 4in. dia. spool of wire right on the gun, reducing travel distance of the wire and providing smooth and trouble-free feeding. Accessory Type Spoolgun, Single, Pair, or System Single, Compatible With Select Northern Industrial Welders. Reduces bad welds and frustration caused by hard-to-feed welding wires Can be used with aluminum, steel, stainless steel and flux-core wire 5-pin snap-on trigger connection, quick-connect gas and bolt-on weld power connection offer quick and easy connection to the welder Comfortable, easy-to-use hand grip Includes 2 extra contact tips and a hex wrench Uses Tweco-style replacement tips and nozzles sold separately