Optimal Compatibility: Designed to fit most hydration bladders, these bite valve replacements are specifically compatible with for Packs Hydraulics Reservoirs. Their universal design ensures they work seamlessly with various types of hydration systems, making them a versatile choice for outdoor enthusiasts. Crafted from silicone, these bite valves offer exceptional durability and elasticity. They are completely odorless and free from harmful substances, providing a soft, comfortable bite and ensuring a healthy drinking experience during your outdoor activities. Replacing your hydration pack's bite valve is simple with these silicone sheaths. Simply remove the worn-out valve and install the new one without any need for modifications to your backpack's drinking tube, making it a convenient upgrade for any hydration system. Package includes four silicone bite valve sheaths, complete with inner posts. This quantity allows for regular replacement, helping to maintain the functionality of your hydration system over multiple adventures. These silicone nozzle replacements are designed to fit a wide range of bite valves, including those that are 360 degrees rotatable and feature on/off functionality. Whether you are biking, running, hiking, or engaging in any other outdoor activity, these are the perfect replacement for maintaining hydration. Colour: Blue Material: Silicone Package Contents: 4 x Bite Valve Replacement Sheath Only the above package content, other products are not included.