High Quality Materials: This SUP pump adapter is made of high quality copper and rubber material. It is quite sturdy and durable. Electric SUP pump adapter uses a standard valve fitting to be paired with a compressor pump or bicycle / tire pump. Easy to use: With the valve in the closed position, insert the valve fitting and twist to lock it in place. Remove the cap from the fitting and connect a standard electric pump. Because compressors / tire pumps put time to inflate, it is recommended to inflate the board by hand until it becomes difficult to pump, then use the adapter to complete the inflation. Fast Inflation: This inflatable SUP valve adapter has easy conversion and its inflation efficiency is quite high. Use your compressor or tire pump to easily reach the recommended psi in less than 5-10min. Lightweight and Portable: Adopt fine workmanship and delicate design, easy to use. Lightweight and portable individual sealed package, easy to use and carry. Universal valve adapter: Suitable for many canoes, kayaks, paddle boats, inflatable boats, etc. Fits all Halkey Roberts H3 inflation valves and Wakooda, Wahoo, Tour, Red Paddle, Isle Explorer, SeaEagle, Hala and Sevylor.