Made in Oregon by Jim Kutella, the K-Pump uses enhanced ABS plastic to make a tough reliable unit that is favored by many guides and outfitters. K-Pumps are designed for use by one person with no hose to slip out. The nozzle with adapters fits all common whitewater valves or your air mattress. The 400 is 4" x 31" and has a two stage function. Low-pressure stage delivers high volume for initial inflation, then switch to high pressure to top off. Comes in its own carry bag. Unlimited 2-year warranty.