Usage Tips:1 Set Inflatable Hot Tub P06574 Coupler Pump Adapter compatible with Bestway, compatible with HydroJet,Compatible with Lay-Z-Spa,Compatible with AirJet 1. Packaging: 1pcs x coupling pump inflation adapter, 1pcs x rubber seal O ring, for seamless hot tub maintenance. 2. Compatibility: These couplers is compatible with Bestway, compatible with HydroJet,Compatible with Lay-Z-Spa,Compatible with AirJet Hot Tubs Coupler Connectors; (for all whirlpools from ). 3. Product Function: Optimize air pressure and water flow, enhance the massage ability of whirlpool bubbles and improve the massage experience. Improve the efficiency of water circulation to ensure clean water in the bathtub. 4. Sealing: Replacement parts ensure a watertight seal for a secure, leak-free connection. 5. Installation: Simple installation process allows for quick and easy replacement of old or damaged couplers.