Manual pull up tank closure. Adjustable abrasive flow valve. Pressure relief valve - 125 PSI. Approximate capacity - 90 lbs.. Tank volume - .9cu. ft. This is used when sandblasting the surface; it uses a jet of sand or grit under air pressure to clean. It's featured on a welded steel frame with two 6" wheels for easy maneuvering. Also included are a blast hood and a blast hose that is 1/2" inside diameter x 8 ft.