Comprehensive set: This pack 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: Made of 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 difference in color or difference does not affect the use, please do not mind, thank you! Color: Blue Material: Silicone Package Contents: 6 * Silicone bite valve covers The above package content only, 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 +/- 1-3 cm.