The Gravity-Flow Portable Eye Wash Unit from Sellstrom is ideal for experiments and construction in remote locations, or labs without a continuous water supply. Simply fill the rugged plastic tank with water and the anti-bacterial solution prepare your eye wash for use. Built-in handle makes it easy to carry. Pull the middle yellow tray down and dual nozzles will softly spray water into your eyes. Place the tray in the upright storage position to stop the spray. Instructions are prominently displayed in center. Comes with an epoxy-coated steel bracket if you'd like to mount it on your wall. Choose from six-gallon or 16-gallon capacities.