"When you need to ""top off"" the air in a towable, you'll appreciate the convenient AIRHEAD Double Action Pump. This double-action air pump inflates and deflates towables, kayaks, boats, airbeds, and other inflatables quickly and easily. It delivers a continuous stream of air on the up and down strokes, double your effectiveness and air efficiency. Or, simply turn the release valve counter-clockwise, and you're pumping air only on the down-stroke, perfect for precision inflation or when there's back pressure. The accordion-style hose stretches to 5' and interlocks to the pump so it doesn't fall off while you're pumping. 14-psi peak pressure. 2L volume per stroke. Includes 4 universal valve fittings to fit Boston valves and stem valves. Double-action design: continuous air stream on the up and down strokes Switchable to pumping only on down stroke for precision inflation or handling back pressure Accordion-style hose"