The K-Pump 400 HP does it all! The unique two-stage design allows you to quickly fill the chambers of your raft or cataraft, then switch to high-pressure mode for refueling. Built to last, easy to use, easy to store. The primary stage delivers a huge volume (approximately 1.6 gal) of air per stroke. When the pressure in the chamber increases and pumping begins to become difficult, a simple rotation of the handle locks out the high volume primary stage and locks out the high pressure "booster" stage. The nozzle tip and included adapters fit most inflatable boat valves - Leafield, Halkey-Roberts, Summit, Boston, Military and AD-2. The ergonomic design is comfortable to use, even during prolonged use. Efficiently operated by one person. No hoses to bend and remove. Easy to store, takes up little space. The sturdy construction is backed by a 2-year unlimited warranty. 5 lb, 4 » Dia. x 31 » H Made in the USA. All K-Pumps float! note This pump comes with a check valve that allows you to use it to inflate military valves and the tapered adapter that most air mattresses and pool toys require. A family of Oregon boaters and whitewater anglers designs these quality hand pumps. Assembled in a workshop for people with developmental disabilities.