Valve Stem Caps Universal Glowing in Dark Fluorescent Car Tire Valve Caps Cover fits Trucks Bikes Motorcycles Bicycles 4-16Pcs Description: 1. It designed with luminous material, when you are driving, a aperture will be formed when the tire hat will produce a unique and luxurious appearance, which is fashionable and dazzling. Protect the valve, effectively prevent from being covered with dust/snow/rainwater, extend the life of the tire. 2. Tire valve stem caps is made of fluorescent materials, it need to absorb the light source, then it glows at night. They can not absorb light sources during the transit in the package. After the ultraviolet flashlight is illuminated, it will have a super luminous effect, or use LED lighting or put it in the sunlight for 5-15 seconds. 3. It is universal and will fit securely on any tire or wheel air valve stem. 4. It is easy installation, with the simple and smooth shape and design our valve stem caps are easily hand tightened. Replace those old and missing tire valve stem caps. Perfect modification for your vehicle. 5. Perfect for any car, truck, SUV, motorcycle, bike or bicycle. Portable and durable, easy to carry and light in weight. Package list: Fluorescent Car Tire Valve Caps Notes: 1. Due to manual measurement, please allow an error of 0-1cm. Please make sure you don't mind before buying. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks!