With the Stansport 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. This unique dual action system saves effort and inflates outdoor accessories faster. The 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.