Fit Hydroflask Tumblers 32oz and 40oz：Designed specifically for Hydroflask travel tumbler 32oz/40 oz. The seal has an inside diameter of 2.99 inch/7.6 cm, an outside diameter of 3.43 inch/8.7 cm, and a thickness of 0.236 inch/ 0.6cm. Please verify your tumbler size before purchasing. Good Sealing Performance: These gasket replacements have good sealing performance. Our rubber seal ensure that your hydroflask tumbler will not leak from the edge of the lid even when shaken or tilted. Safe & Durable Material: The o rings are made of high quality silicone, not easy to break and deform. Easy to clean and dishwasher safe. Package Contains: You will receive 7 seals and 2 auxiliary tools. It is a good choice for gift for your family and friends. Maintenance & Replacement Tips: To maintain optimal performance and ensure healthy drinking water, we recommend replacing the sealing ring every few months. The sealing ring can be easily removed and installed using the supplied tool. Prevent leaks effectively with our premium silicone seals designed specifically for Hydro Flask Tumbler. Our cost-effective replacement solution eliminates the need for new caps or bottles. This set includes 7 seals and 2 removal tools. Perfect for your Hydro Flask 32 oz or 40 oz travel tumbler. Enjoy worry-free sipping!