With the Double Action Hand Pump, you'll be able to puff up a flat air mattress, and turn a deflated raft into a water-worthy adventure-craft! Ordinary pumps only inflate on the downstroke, but this pump creates a continuous stream of air on both the down and the up-stroke. Its unique dual action system saves effort and inflates outdoor accessories faster. This pump is constructed of durable, high-impact plastic that won't discolor or corrode in damp environments, and is equipped with a non-kink hose with adapters to fit most commonly used valves.