Simple to turn Square Base Hi Impastic Plastic Design Fits all Airhead Boston Valve inflatables Bright red color for increased visibility Inflate with speed and flexibility Always Carry a Spare! The 2 Boston valves have different thread patterns. One is sure to fit the thread pattern of your inflatable, no matter what brand They have square bases, which are much easier to turn than round, especially with wet hands Bright red, so they’re easy to find