Azar Displays Wall Mount File Holder with suction cups are designed to hang on glass doors, windows, and walls. The high quality suction cups ensure long-term holding power. For best results, apply to a clean, non-porous surface such as glass. The hanging wall file holders with heavy duty suction cups maximizes work space and keeps your material organized and accessible. Ideal for storing documents, catalogs, files, folders, papers, and magazines. The clear construction provides easy viewing of documents. Use these file organizers in your office, medical facility, hospitals, schools, banks, at home and much more. The plastic material of the wall folder holder is made of injection molded high-grade polystyrene making it strong and durable. These wall file holders are easy to install using the two attached suction cups. These suction cups have been field tested and proven to hold long term when used on non-porous surfaces such as glass.