Rotational-molded plastic construction. Easily installs under driver's seat. Reservoir holds 3.75 gallons of water. Self-priming, 12-volt pump operates at 60 p.s.i. Features: Mounting location provides convenient access to power switch and brass quick-connect. Includes 8-foot coiled hose and durable glass-filled nylon spray gun. Convenient accessory for cleaning radiators and windshields in remote locations.