The Kolibri Foot Pump is a solid high pressure foot pump that features two separate air chambers. The pump is made of sturdy materials for a long life and is very easy to use. This pump is optimized for inflatable boats and dinghies with an inflatable bottom where high pressure is required. There is also a built-in overpressure valve to prevent any damage to your boat. In short, everything you desire from a foot pump of rock solid quality at a very attractive price!