Trusted worldwide - The case prized by museum curators, archivists, and photographers for prce-conscious durability. These cases provide ideal, long term archival storage for prints, photographs, and documents. The sides and spine are made of low-resin basswood for superior stacking strength; the top and bottom are sturdy (.098) binder board. Heavy acrylic-impregnated black cloth covers ensure long-lasting use and are easy to clean. The case is lined with TrueCore™ 133 card stock for complete archival safety. Adhesive is pH balanced with .0008% sulfur content. The latches are designed to withstand repeated opening and closing, and a convenient label holder is also included. 2 1/2" deep. TransPort™