BEAD-SEATER 7 Gallon Aluminum RAMBO DSR-7 has a 7 Gallon air tank NOT 5 gallon like most of our competitors. RAMBO has a commercial grade aluminum tank. RAMBO has a durable rubber coated tip on our nozzle to prevent damaging aluminum rims. RAMBO has 1-1/2 ball valve. RAMBO engineered a built in and out of the way work stand.