Waste fluids flow through the Drain Tray Tube from the instrument to a waste drain or container. The Drain Tray Tube Kit comes with 6 ft. of Drain Tube, (1) 6138 Tube Clamp, (2) 8288 Elbow Connectors, and (1) 8133 Adhesive Clamp that is used to hold the tube to the bench surface.