H-R connector adapt inflatable boat foot pump or electric pump hoses to fit Halkey-Roberts valve. Ideal for use with electric pumps, hand pump or foot pump. It's easy to inflate and to deflate.It's 3/4 inch in diameter on the valve side and 13/16 inch diameter on the hose side. End to end length= 1 15/16", Hose End Diameter= 13/16", Halkey-Roberts End Diameter= 13/16".The pump hose valve adapter is made of Eco-friendly solid thick plastic, With high flexibility and high strength, Replaceable and useful. Great replacement accessories for various kayaking. Switch the part washer with your dinghy/pontoon/SUP/board/kayak/boat/pontoon valve cap washer for an air tight fit.Pefectly compatible with following 16-25 PSI sup electric pump: model SLPUMP10, SLPUMP20, SLPUMP30, SLPUMP50, HT-716, HT-721, HT-723, HT-721PRO, HT-HT-768,HT- 781,HT-782,HT-790,HT-767, HT-767C and more.Air Valve Adapter fits HR valves for connection to electric pump compressors,fits Naru valves on Wahoo and Wakooda iSUP.Can inflatable for kayaks,trampolines and bouncers,air track mat ,paddle board,inflatable GYM and so on