This is the most convenient pump on the market. It is great to use to inflate small inflatables and airbeds or to use with a 12V pump to top off your larger inflatables so they are nice and firm. The double action hand pump provides a continuous stream of air on the up and down stroke for faster inflation. It is made from lightweight, non-corrosive plastic and comes with 4 inflation adapters for just about any valve you will come across. Double Volume/Double Action With Continuous Airflow On The Up And Down Stroke 0.3 Bar Pressure And 2 × 2 Liter Hose Locking System That Allows The Hose To Lock Into The Body So It Wont Fall Off During Use 4 Universal Valve Adapters Heavy-Duty Molded Construction with Ergonomic Handle and Foot Plate