Mat Board Center, Archival Photo Storage Box, Clamshell Box for Storing Artwork, Photos, Documents, Prints, Acid-Free Preservation Box Sturdy Organizer – [Black – 16″ x 20″] ARCHIVAL QUALITY: Made from museum grade archival boxboards materials that resists denting or bending, our photo storage boxes are acid-free, lignin-free, portable, and attractive. MULTIPLE USE: This archival box is perfect for storing your important artwork, photos, memorabilia, documents, prints, old paper, newspaper, maps, treasured possessions and more. EASY TO ORGANIZE: This acid-free box is used as a durable, portable storage or for display. The lid with clamshell design and 'thumb-cut' for easy access...