A replacement for the inflatable liner supplied with your Lay-Z-Spa Cancun AirJet (2021 model). The liner is the hub of your Lay-Z-Spa, holding the water and connecting to the heater pump. It also features integrated massage jets for a relaxing spa experience. If you're unsure which replacement part you need, contact the Bestway Aftersales team for assistance. This liner is specifically for the 2021 Lay-Z-Spa Cancun AirJet and includes buckles to secure the inflatable lid and top cover. If your existing top cover does not have buckles, it may not secure properly to this liner. The liner will appear smaller than the original upon arrival but will expand to the correct size when inflated due to the vinyl material reacting to ambient air temperature and water heat. Once fully expanded, it will match the original appearance. Please note: This liner does not include replacement Screw Valves.