Ideal for storing and protecting artwork photographs limited edition prints family heirlooms maps plans old documents and much more. These protectors support and protect contents from stress dirt fingerprints and atmospheric pollutants and are made from heavy-duty .010" clear polypropylene with reinforced black nylon binding on all sides. Features sewn edges and an acid-free black paper insert. Guaranteed archival quality neutral pH and acid-free. Great for temporary displays or items that need to be handled frequently. First dimension is opening edge. Packaged and sold 6-pack.