This Tweco 1420-1103 Fabricator 42-23-15 MIG Conduit Liner is 15 feet long. It has a zinc-plated spring wire to minimize corrosion on the metal surface and each wire conduit has a brass alloy machined stop on the back end. It is designed to be used with Professional Choice MIG guns #1 and #2 series and Spray Master MS250 series MIG guns. Specifications: Processes: GMAW Wire Conduit Material: Zinc Plated MB Spring Wire Spring Wire Diameter: 0.041" (1.04mm) Welding Wire Diameter: 0.023" (0.6mm) Overall Length: 16 feet (4.88m) O.D. Diameter: 0.123" (3.12mm) I.D. Diameter: 0.041" (1.04mm).