Comprehensive Set: This package includes six high-quality silicone bite valves in a vibrant color, each with an inner column. Perfect for personal use or sharing with friends and family, ensuring you always have a spare. Universal Fit: These bite valves are designed to be universally compatible with most hydration backpacks and are especially suitable for hydration systems. Superior Quality Material: Made from premium silicone, these bite valves 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 backpack. Simply remove the old valve and insert the new one for a quick and easy upgrade. Versatile Use: Perfect for a variety of outdoor activities such as cycling, running, and hiking. These bite valves are essential replacements or upgrades, ensuring you stay hydrated without interruption. Please note: the physical color difference or difference does not affect the use, please don't mind, thank you! Color: Red Material: Silicone Package Contents: 6 * Silicone Bite Valve Cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.