Avoid Traffic Accidents: We all know that when you are ready to open the car door, it is easy to accidentally hurt the car coming from behind or pedestrians, and then cause traffic accidents. You won't have to worry about that when you have our highly reflective warning stickers! The night visibility warning stickers make your trip safer. Reliable Materials: The door reflective sticker is made of high-quality PET material, which is high-quality corrosion-resistant, waterproof, sun-resistant, rain-resistant and durable. We use full prismatic reflection technology to provide you with the highest visibility. Even at night, this highly effective reflective sticker is clearly visible. Super Sticky: The self-adhesive design is very easy to install. You just need to clean any dust or residue from the target location with water and wait for it to dry. Peel off the protective film on the back and press for a few minutes to complete the installation. Please rest assured that it is not damaging to the car paint and you can easily tear it off when you don't need to use it. One Size Fits All Cars: The mini size of 9.2 x 2.5cm is suitable for any vehicles, such as cars, SUVs, motorcycles, bicycles, etc. In addition, it is not only a car door warming sticker, but you can cover it to the other clear places of your vehicle to improve traffic safety. That reduces the probability of traffic accidents to improve driving safety. Package Includes: You will get 4 x OPEN car warning stickers. Each door opening reflective sticker is self-adhesive and comes in your choice of six colours to both dress up your car and keep you safe.