Optimal Compatibility: Designed to fit most hydration bladders, these bite valve replacements are compatible with various hydration reservoirs. Their universal design ensures seamless functionality with different types of hydration systems, making them a versatile choice for outdoor enthusiasts. Superior Silicone Quality: Crafted 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 without any modifications to your backpack's drinking tube, allowing for a quick and convenient upgrade. Comprehensive Package: Includes four silicone bite valves, each with inner posts. This quantity supports 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, they help ensure 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 image and the actual item. Measurement may vary by +/- 1-3 cm.