Combine ultimate performance and efficiency with the Bestway Air Hammer double-stroke piston pump! With a size of 36 cm and a stroke volume of 1.85 litres, it is designed for maximum air flow. The pump works with both upward and downward strokes, which shortens the entire inflation and deflation process even further. The flexible hose and the 3 different valve adapters allow the pump to be used on many different inflatables. Whether you are using a baby pool, air mattresses, boats etc. - the Air Hammer will inflate it! The pump is also easy to transport and store.