These exclusive Dura-Clear Polypropylene Bags, also known as Photo / Art Bags, are acid-free (archivally safe) and have a variety of storage uses. From documents and ephemera to original art, prints, and photographs. Strong, yet very thin (.0017" thickness) film gives maximum clarity for the items they contain. Self-adhesive flaps feature removable adhesive so they can be easily opened and resealed numerous times. Designed for either short or long term storage or shipping, these bags are also reusable, which makes them more environmentally friendly than other plastic enclosures. Opening on the first dimension listed. Price per package.