Optimal Compatibility: Designed to fit most hydration bladders, these bite valve replacements are specifically compatible with packs and hydraulic reservoirs. Their universal design ensures seamless functionality with various types of hydration systems, making them a versatile choice for outdoor enthusiasts. Superior Silicone Quality: Made from high-quality silicone, these bite valves offer exceptional 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. Remove the old valve and insert the new one directly into the drinking tube without any modifications, 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 to maintain the performance and hygiene of your hydration system over time. Versatile Use: These nozzle replacements are designed to fit a wide range of bite valves, including 360-degree rotatable styles and those with on/off functionality. Ideal for biking, running, hiking, and other outdoor activities, they help maintain reliable hydration. Color: Blue Material: Silicone Package Contents: 4 x Bite Valve Replacement Sheath Note: Light reflection and different display settings may cause slight variations in color between the product and the image. Measurement may vary by up to +/- 1-3 cm.