The K-Pump K-40 high-pressure hand pump is the "little brother" of the K-400. Same excellent two-stage design, with high-volume and high-pressure modes. More compact and easy to store where space is limited. The K-40 is the ideal choice for small boats - IKs, kickboats, etc. Only 24" long, 4" in diameter and 3 pounds in weight, it stores compactly. The primary stage delivers approximately 1.2 gallons of air per stroke, quickly filling your tubes. 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, AD-2 and military valves. 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. 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.