A. **Function and Compatibility** - The SID air chamber valve is used to maintain the air in the air chamber of Bestway inflatable massage bathtubs. The following is a replacement screw - type air chamber valve suitable for some newer models of Bestway inflatable massage bathtubs. - This valve is compatible with the following models: 1. Bestway Premium/Miami model, model number BW54112 (newer model) 2. Bestway Las Vegas model (newer model, suitable for single - valve or triple - valve types) 3. Riviera model 4. Saint - Tropez model 5. New York model 6. Paris model 7. Las Vegas model 8. Miami model 9. Maldives model 10. Bali model 11. Tahiti model 12. Cancun model 13. Ibiza model 14. Havana model 15. Baja model 16. Rio model 17. Saint Lucia model 18. Bahamas model 19. Barbados model 20. Madrid model 21. Palma model 22. Fiji model 23. New York model B. **Product Features** - It is important for inflation and deflation. - It helps prevent air leakage from the inflatable massage bathtub. - It can replace a lost or damaged valve. - The screw diameter is about 22 millimeters. C. **Product Quality and Delivery** - Our products are made of good materials to provide a decent user experience. - We aim to ship the product within three days after you place an order. The estimated delivery time is 8 - 86243 days. D. **Shopping Tips and Customer Service** - When shopping, please pay attention to the product's size and specifications to make sure they meet your needs. In the title and description, we have provided detailed information about the product, including its features and specifications. - We hope you are satisfied with your purchase. Therefore, if you have any questions or concerns, please feel free to contact us. We will do our best to assist you. E. **Appreciation** - Thank you for choosing our products. We hope you like them.