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 for a healthy drinking experience during outdoor activities. Effortless Installation: Replacing your hydration pack's bite valve is simple. Just remove the old valve and insert the new one into the drinking tube without any modifications required, offering a convenient upgrade for your hydration system. Comprehensive Package: Includes four silicone bite valves, each with inner posts. This quantity allows for regular replacement, helping maintain the hygiene and performance 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 where reliable hydration is essential. Color: Blue Material: Silicone Package Contents: 4 x Bite Valve Replacement (Sheath Only). Other items not included. Note: Due to light reflection and display differences, the color in the image may vary slightly from the actual item. Measurement error allowed is +/- 1-3 cm.