It is made of polyvinyl chloride or polyester film as the base material, coated with permanent acrylic pressure-sensitive adhesive. The surface has good gloss, durability and flexibility, and can be used for printing and thermal transfer printing. The glue has excellent stick-on properties and can be used in outdoor environments for a long time with suitable inks without warping, falling off or fading. It is often used for marking outdoor equipment and facilities such as transformers, communication base stations, billboards, telephone poles, street lights, pipelines, etc.