Universal Valve Adapter The Sup valve adapter is the universal standard for most different canoes, kayaks, paddle boards, inflatable boats, dinghies, etc. Please confirm the detailed dimension by the photos. Easy to Use When the valve is in the closed position, please insert the valve and turn it to lock it in position. Open the valve cover, and connect an electric pump or a manual pump for the inflatable. Premium Material and Anti-Leakage The kayak adapter is made of high quality PA66 and made of alloy material, which has excellent airtight and anti-leakage performance for long life use. Sturdy seal and anti-leakage protection. Practical Tool Kayak accessories are a very useful tool to inflate with a normal gas generator. You don't need to buy an inflator for kayak pump adapters. Fast Inflation With your electric vane pump adapter or tire pump, pumping vanes is easy to reach the suggested ISP in 5-10min