Miller Resistance Spot Welder. 220 single phase, 45 amps. 18” throat and 3” opening. Welder is 220, automatic mode requires airline pressure. Has on/off switch, has timers for pressure and duration of weld. Comes with a foot control. Not a new machine but very tried and true. It comes with all hoses necessary and a brand new radiator. It can be hooked up for a demonstration, or I have a video of the last weld it made.