[Improve safety] Use ultra-bright reflective materials, more visible at night. Attract the attention of pedestrians and vehicles, avoid traffic accidents. [Working principle] Reflective strips are retroreflective. This means that incident light is reflected directly back to the light source. That is, to see the reflection, the light source must be positioned in or near the axis between the eye and the reflector. [Easy to install] Make sure that the surface is dry and clean. Stick the adhesive backing to the desired surface. With weather-proof, UV-proof and water-proof function, suitable for all weather conditions. [Versatile use] The finished stickers have a curvature in order to optimally adapt to the shape of your the rim and visually high quality. Suitable for trucks, bicycles, motorcycles, racing cars, cars, bags and wheelchairs. [IMPORTANT] If your bike is equipped with a brake system with brake shoes or pads, please place the sticker under the brake band on the rim. Product description: Features: < p>Color: yellow. Package content: 20 reflective wheel stickers. Note: the data are manual measurement, please allow 1-50cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.