The K-400 is a true two-stage pump. The primary stage delivers a huge volume (approx. 1.3 gals) of air per stroke. When the pressure in the raft increases and pumping starts to become difficult, a simple twist of the handle locks out the high-volume primary stage and locks in the high-pressure "top-off" stage. Just 5 lbs. and 31 inches i
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This thing is awesome! It seriously pushes some air. I purchased this for my Flycraft Stealth X boat. Its low profile enough to strap to the gear rack and not take lots of space. Comes with several adaptors to fit various airnports. Well worth it so far.