spool gun is pro to welding aluminum, improves results when welding aluminum.spool gun provides consistent wire feeding of aluminum wire while welding. Mig welding spool gun accepts 4 inch spools of wire。Our spool gun uses high quality available contact tips and nozzle, more durable to use. Suitable for:Aluminum/Stainless Steel/Iron/Copper Alloy welding Wire Size:0.5KG/1.0KG Roll Wire,with size 0.6/0.8mm Total length of the torch:3.0 meters/118.11 inchesSpool Gun 200A 1.Applicable Wire Diameter: a. Mild Steel: 0.4mm, 0.6mm, 0.8mm. Suitable for CO2. b.Aluminum: 0.6mm, 0.8mm, 1.0mm Suitable for Ar. c. Stainless Steel: 0.6mm, 0.8mm Suitable For Co2+Ar. 2 .Rate Current: 200A 3.Rated Duty Cycle: 60% 4.Wire Feeding Speed: Max 16m/Min 5.Voltage: DC24V 6.Cooling System: Nateral Air Cooling 7. Length Of Cable: 4m; 6m; 8m 8. Speed Adjust Potentiometer: 1KΩ,5kΩ,10kΩ 9.Spool Size: 102mm 10.Interchangeable Gun Neck: Straight Neck, Swan Neck(15AK, 24KD, 36KD. Pana350A, Pana500A Etc.)