Industry Leading Durability - Our Fluorescent Paper Labels are made of 50# colored paper. Fluorescent labels are hard to miss - attracting attention 75% quicker than traditional white labels. Our Warning - You are Illegally Parked Violation Sticker comes with a permanent acrylic adhesive. After adhesion onto glass, the user will have to use a scraper to remove the label. For less aggressive enforcement, leave the liner on the label and place it under the violator’s wiper. Stickers have a tab, so it is easy to remove the paper liner. Labels Give a Warning – So You Don't Have To - Personally warning people is not always the right solution. Say it with labels! Signs and labels are the safest and the most effective medium to reach out to maximum people on your property. Ideal For Recordkeeping - Printed liner on the violation sticker can be used to record the license number and date as an office record. Use a pencil, pen, or marker to write on the labels.