The 169724 Miller style mig welding nozzle fits Miller M25 & M40 mig welding guns. It has a 1/2" opening at the weld surface with a 0.125" recess for the contact tip. The M25 & M40 mig guns are usually standard on Millermatic 200, 210, 212, 250, 251, 252, 300 and Vintage MIG welders.
