AIR VALVE FOR KAYAK: Our inflatable air valve replacement is a one-way air valve that can be quickly inflated. It is an ideal choice for inflating inflatable boats, kayaks, inflatable mattresses, canoes, inflatable rafts, etc. GOOD WATERPROOF: The bottom of the air valve screw for inflatable is designed with a rubber stopper, which can effectively prevent air leakage. The design of other nuts and threads can make it have good sealing performance. It is an indispensable tool for outdoor water sports. LONG LIFE: The Inflatable Kayak Air Plugs are made of high quality and high density PP plastic. It is durable, has the characteristics of anti-seawater corrosion, anti-leakage and long service life. EASY TO USE: The Air Valve Adapter Valve Caps are simple and convenient to use. Its installation is also very simple and quick, saving you time. APPLICABLE SIZE: The diameter of the threaded part of the Spiral Inflation Valve is approximately 22 mm. The inflatable boat screw valve can be installed in the piston hole about 22mm / 0.78inch. Before purchasing, please check the size of the inflation port to determine whether the valve is suitable.