The Lincoln Electric Weld-Pak 100 Wire Feed Welder MIG Conversion Kit has a gas regulator for argon and argon-blend gases. This kit is designed to convert the Weld-Pak 100HD from a flux-cored welder to a MIG and flux-cored welder. It includes a 0.025-0.030 in. (0.6-0.8mm) cable liner, two 0.025 in. contact tips, a gas nozzle, a 2 lbs. spool of 0.025 in. SuperArc L-56 mild steel MIG wire connectors, an adapter for CO2 cylinders and a 115-Volt gas solenoid hose. Size: 11.0 In.