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 or Miami Model Number BW54112 (Later Style)Bestway Lay-Z-Spa Vegas Later Style (with either single valve 3 valves)RivieraSaint TropezNew YkParisVegasMiamiMaldivesBaliTahitiCancunIbizaHavanaBajaRioSt LuciaBahamasBarbadosMadridPalmaFijiNew YkProduct features:Essential f screw deflationPrevents air leaking from the Lay-Z-SpaDirect replacement f a lost broken valveScrew diameter 22mm approx.Our products are made with the highest quality materials are designed to provide you with the best possible user experience. We strive to ship out all ders within three days of purchase, the estimated delivery time is 8-15 days.When shopping, please pay attention to the size dimensions of the product to ensure that it meets your needs. In the title , we have provided detailed infmation about the product, including its features specificationsWe want you to be completely satisfied with your purchase, so if you have any questions concerns, please don''''''''t hesitate to contact us. We are here to help will do our best to assist you.Thank you f choosing our product. We hope you enjoy it