Retaining Head Compatible with Brand Tough Gun Series TOUGH LOCK(TM) Gas Diffuser Number 404-18-25 Compatible with Series TOUGH LOCK Connection Type Slip-On Duty Rating Standard Duty Welding Processes MIG Welding (GMAW) Connection Thread Type Slip-On For Use With Bernard Air-Cooled and T-Gun Water-Cooled MIG Guns Fume Extraction MIG Guns Tregaskiss Robotic Air-Cooled and Water-Cooled MIG Guns Material Brass Maximum Wire Diameter 0.125 in Minimum Wire Diameter 0.023 in