Airhead AHMV-1 Multi Valve 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. All components are bright red and green, so theyre easy to find.