Optimal Compatibility Designed to fit most hydration bladders, these replacement bite valves are specifically compatible with Hydraulics Reservoirs for Osprey Packs. Their universal design ensures they work seamlessly with different brands and types of hydration systems, making them a versatile choice for outdoor enthusiasts.Superior Silicone Quality Made of highquality silicone, these bite valve covers offer eceptional durability and elasticity. They are completely odorless and free from harmful substances, providing a soft, comfortable bite and ensuring a healthy drinking eperience during your outdoor activities.Easy Installation Replacing your hydration packs bite valve is easy with these silicone covers. Simply remove the worn valve and insert the new one without having to make any modifications to your backpacks hydration hose, making it a convenient upgrade for any hydration system.Comprehensive Package Includes four silicone bite valve caps, complete with inner posts. This ample quantity allows for regular replacement, helping to maintain the hygiene and functionality of your hydration system over multiple adventures.Versatile Use These silicone mouthpiece replacements are designed to fit a wide range of bite valves, including those that are 360 degrees rotatable and have an onoff function. Whether youre cycling, running, hiking, or participating in any other outdoor activity, these covers are the perfect replacement to maintain hydration.Color BlueMaterial SiliconePackage contents4pack Replacement Bit Valve CoverOnly the above package contents, other products are not included.Note Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is 13 cm.