The Airhead Multi-Valve consists of 2 Boston valves that will fit all Airhead Boston Valve equipped inflatables. The Boston Valves have a square base, which is much easier to turn than a round base, especially with wet hands. Use the Shrader valve to inflate your inflatables at a gas station or with an air compressor. Alternatively, screw off the Shrader valve and inflate the Boston valve with an Airhead air pump.