Bestway AIR Hammer 62227 Pump Properties: The Bestway high-pressure hand pump with pressure gauge will allow you to easily inflate air mattresses, air beds, swim rings, pontoons, SUP boards, balls and more. Aluminum piston. Handles with non-slip finish. Manometer with clear 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). The set includes 5 different adapters. Technical data: Dimensions: 25x10.5x65 cm Displacement: 1.8 L/cycle (unidirectional), 3.45 L/cycle (bidirectional) Number of adapters: 5 · Pump suitable for most inflatable items with a working pressure of 5-23 PSI Single/Dual Switch Pump (up to 7 PSI in dual-action mode, up to 23 PSI in single-action mode) Function: inflating, deflation · Easy-to-read display with built-in pressure sensor Flexible hose