Fangrui Product Details Comprehensive Set: This Package Includes Six High-quality Silicone Bite Valves In A Vibrant, Each Featuring An Inner Column. Ideal For Personal Use Or Sharing With Friends And Family, Ensuring You Have A Spare. Universal Fit: Designed To Be Universally Compatible With Most Hydration Packs, These Bite Valves Are Particularly Suited For Hydration Systems. Superior Quality Material: Crafted From Premium Silicone, These Bite Valve Offer Durability, Elasticity, And Reliability. They Are Tasteless And Safe, Enhancing Your Hydration Experience During Any Activity. Hassle-free Installation: Easily Your Old Or Damaged Bite Valves Without Any Modifications To Your Hydration Pack. Simply Remove The Old Valve And Insert The New One For A Quick And Effortless Upgrade. Versatile Use: For A Variety Of Outdoor Activities Such As Biking, Running, And Hiking. These Bite Valves As Essential Replacements Or Upgrades, Ensuring You Stay Hydrated Without Interruptions. Please Note:the Physical Slightly