Pump Bestway AIR Hammer 62227 High-pressure hand pump with manometer Bestway allows without problem inflating inflatable mattresses, inflatable beds, wheels for swimming, inflatables , SUP boards, balls and others. Aluminum piston. Handles with anti-slip finish. Pressure manometer with readable display. By changing the position of the flexible hose, you can quickly and easily switch between double stroke mode (up to 7 PSI) and single stroke mode (up to 23 PSI). 5 strokes are included in the kit ;various adapters Technical data:· Dimensions: 25x10.5x65 cm· Stroke volume: 1.8 L/cycle (unidirectional), 3.45 L/cycle (bidirectional) Number of adapters: 5 Pump suitable for most inflatable items with working pressure 5-23 PSI Pump with single/double switch (up to 7 PSI in double action mode, to 23 PSI in single action mode) Function: inflate, deflate Easy to reading display with built-in pressure sensor· Flexible hose