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 replace 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: Perfect 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 color difference or difference, does not affect the use, please do not mind, thank you Colour:Blue Material:silicone Package Contents: 6 * silicone bite valve Sheath