Usage Tips: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 always 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 replace your old or damaged bite valves without any modifications to your hydration pack. Simply remove the old valve and insert the 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 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.