
Four output voltage settings give you a broader operating window for each wire type. Lets you quickly adjust for stock thickness or type of joint.
* Built-in contactor--keeps wire electrically "cold" until you pull the trigger
* Durable feed head with quick-release--adjustable feed tension, easy access for threading wire
* Dual groove quick-change roll--quickly change wire sizes
* Primary circuit breaker overload protection
* Self-resetting thermal overload protects transformer
115V, 20 amps, 60 Hz; Rated output: 90 amps, 19 volts DC @ 20% duty cycle; Current range: 30 to 125 amps; Maximum open circuit voltage: 29 volts; Wire feed speed range: 0-415 inches per minute (500 IPM max, no-load); Overall dimensions: 16-7/8'' x 9-7/8'' x 12-1/8''; Tool weight: 50 lbs.
ITEM 4270-1VGA
Also looking at this;

Pressurized design gives 30% more blasting power than siphon units. Provides more abrasives when you need truly efficient performance.
Equipped with a nozzle end shut-off valve, pressure gauge, ceramic nozzle, 9 foot hose, filling funnel, water trap, 6'' rubber wheels, and canvas hood.
* Compressor requirement: 6-25 CFM @ 60-125 PSI
* Dimensions: 33-1/2'' x 18-3/4'' x 13''
* Tool weight: 57 lbs.
ITEM 34202-4VGA
This is for working on the MUTT not an MG42

Steve