Optimal Compatibility: Designed to fit most hydration bladders, these bite valve replacements are compatible with various hydration reservoirs. Their universal design ensures seamless integration with different types of hydration systems, making them a versatile choice for outdoor enthusiasts. Superior Silicone Quality: Made from high-quality silicone, these bite valves offer excellent durability and elasticity. They are odorless and free from harmful substances, providing a soft, comfortable bite and ensuring a safe drinking experience during outdoor activities. Effortless Installation: Replacing your hydration pack's bite valve is simple with these silicone valves. Just remove the old valve and insert the new one without modifying the drinking tube, allowing for a quick and convenient upgrade. Comprehensive Package: Includes four silicone bite valves, each with inner posts. This set provides ample replacements to maintain the performance and hygiene of your hydration system over time. Versatile Use: These silicone nozzle replacements are designed to fit a wide range of hydration systems, including those with 360-degree rotation and on/off functionality. Ideal for biking, running, hiking, and other outdoor activities. Color: Blue Material: Silicone Package Contents: 4 x Bite Valve Replacement Sheath Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement may vary by +/- 1-3 cm.