A. Comprehensive Set: This package includes six silicone bite valves in a vibrant color, each featuring an inner column. Suitable for personal use or sharing with friends and family, ensuring you always have a spare. B. Universal Fit: Designed to be universally compatible with most hydration packs, these bite valves are particularly suited for Osprey hydration systems. C. Superior Quality Material: Crafted from silicone, these bite valve sheaths offer durability, elasticity, and reliability. They are tasteless and safe, enhancing your hydration experience during any activity. D. 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. E. Versatile Use: Suitable for a variety of outdoor activities such as biking, running, and hiking. These bite valves serve as essential replacements or upgrades, ensuring you stay hydrated without interruptions. F. Please note: the physical product may have slight color difference, which does not affect the use, please do not mind, thank you! G. Colour: Blue/Red H. Material: silicone I. Package Contents: 6 * silicone bite valve Sheath J. Only the above package content, other products are not included. K. 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.