The DEWALT DXCMTA6590412 4-Gallon Pontoon Air Compressor is a low-maintenance, oil-free, direct drive operation powered by a 5 HP Kohler OHC/OHV premium residential gas engine with overhead Cam/Overhead Valve (OHC/OHV) that provides easy starting, smoother engine performance, lower fuel consumption and lower emissions. The air compressor includes a patented pump design with two piece cooling system that increases cooling efficiencies, lowers operating temperatures and extends the life of the pump. The 155 PSI max pressure enables optimum tool performance. A pontoon style tank design with two-2 gal. tanks for job-site portability is equipped with regulator, gauges, quick connect and cushioned handle grips.