1Glow in The Dark: Made of special materials, tire cap absorbs light when there is light and emits light in the dark, making your car cool at night. 2Prevent Tire Leakage: Te cap can prevent the tire from leaking, thus effectively improving the driving safety and ensuring the extension of the use time of the tire. 3Dust Prevention: The tire valve cap can protect the tire valve from dust and dirt, and extend the service life of the tire. 4Wide Scope of Application: Fluorescent tire valve stem cap is applicable to all standard tires of automobiles, motorcycles, bicycles, etc. 5Simple Installation: The night glow tyre valve cap is easy to install without tools. Simply screw it onto the tyre valve stem.