Continuous stream- pumps air on both the up and down stroke. Ideal for large inflatable mattresses. Made of lightweight, non-corrosive plastic. Disassembles easily for inspection or maintenance. Simple push-in hose-to-pump connection inflates or deflates. comes with large, non-link hose and 5 sizes of interchangeable connecting nozzles. new locking system to avoid hose unfastening from pump while inflating or deflating. features large handle and foot pump.