Airhead High Pressure Hand Pump: * Double action pump * Inflates and deflates towables and other inflatables * Delivers a continuous stream of air on both the up and down strokes * Can pump air only on the down-stroke * 4 universal valve fittings are included to fit Boston valves and stem valves * Accordion-style hose stretches to 5" long and interlocks to the pump * Volume is 2 liters per stroke * Very effective for "topping off" large towables in the boat * Peak pressure: 14 psi * 90-day warranty