Lineco Museum Archival Drop-Front Storage Box, Acid-Free with Metal Edges, 23 X 31 X 3 inches, Gray (733-0022)Size: 23 X 31 X 3 inches Designed specifically for archival storage and preservation of valuable artworks, documents, photographs, and other items Constructed with acid free materials to prevent acid migration and deterioration of stored materials Features metal edges for added durability and protection against wear and tear Drop front design allows for easy access to stored items without damaging or disturbing the contents Item Number: 733 0022