Optimal Compatibility: Designed to fit most hydration bladders, these bite valve replacements are compatible with Hydraulics Reservoirs. Their universal design ensures compatibility with various hydration systems. Superior Silicone Quality: Made from high-quality silicone, these bite valves offer durability and elasticity. They are odorless and free from harmful substances, providing a soft, comfortable bite. Effortless Installation: Replacing your hydration pack’s bite valve is simple—remove the old valve and insert the new one without modifying the drinking tube. Comprehensive Package: Includes four silicone bite valves with inner posts for regular replacement. Versatile Use: These nozzle replacements fit a wide range of bite valves, including rotatable and on/off styles. Suitable for biking, running, hiking, and other outdoor activities. Color: Blue Material: Silicone Package Contents: 4 x Bite Valve Replacement Note: Color may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.