Description Description: Luminous Tire Valve Covers: These rubber valve caps are luminous, well over the valve stem hat glowing in the dark, making your night riding more exciting. High Quality Material: Valve Stem Covers made of Rubber material, durable, sturdy, can use long time. Convenient Install: Easily hand tightened without any tools, tire valve caps protect the tire valve from dust and extend the service life of the tire. Universal: Glowing Tire Valve Stem Caps suitable for cars, RVs, motorcycles, SUV Cars, bicycles, trucks, etc. Note: If want more glowing effect, first absorb enough light/sunlight. Specification: Material: Rubber Inner Diameter: 0.8cm/0.31inch Outer Diameter: 1.2cm/0.47inch Height: 1.6cm/0.63inch Package Includes: 10 Pieces Luminous Tire Valve Stem Covers Note: Please allow slightly errors due to manual measurement and different monitors.