[High-quality valve] The screw-in valve is made of high-quality, high-density PP plastic. It is durable, resistant to seawater corrosion, leak-proof, and has a long service life. It is the best choice for your kayak, canoe, or inflatable boat. [Leak-proof design] The replacement kayak hardware screws are designed to prevent air leakage. There is a rubber cushion under the air cap. When inflated, the rubber pad under the 20mm screw of the air valve automatically fits the edge of the air cap, preventing air leakage more effectively and providing you with safer protection. [Fast Inflation and Deflation]: The screw air valve for inflatable boats can be installed on the piston hole of about 20mm, which speeds up inflation and deflation and saves your time. [WIDE APPLICATIONS]: Suitable for most kayaks, inflatable boats, rafts, rubber boats, etc. [Suggestion]: The diameter of the threaded part of the screw-in valve is about 20mm. Before purchasing, please check the size of the inflation port to ensure that the valve is suitable.