Lay-z-spa Air Cap Screw Valve Fits Bestway Vegas Premium SID Air Chamber Valves are used to keep air in your Bestway Lay-Z-Spa air chamber.Replacement Air Chamber Screw Valve to fit later Bestway Lay-Z-Spa inflatable hot tub models as listed below.Valve will fit models below:Bestway Lay-Z-Spa Premium/Miami Model Number BW54112 (Later Style)Bestway Lay-Z-Spa Vegas Later Style (with either single valve or 3 valves)RivieraSaint TropezNew YorkParisVegasMiamiMaldivesBaliTahitiCancunIbizaHavanaBajaRioSt LuciaBahamasBarbadosMadridPalmaFijiNew YorkProduct features:Essential for screw and deflationPrevents air leaking from the Lay-Z-SpaDirect replacement for a lost or broken valveScrew diameter 22mm approx.