The Letter Archival Document Storage Case in blue/gray from Lineco holds documents, folders, and files to protect them from damaging dust and sunlight. The 12.5 x 10.5 x 5" box features a flip-top design, is buffered, and  is made with acid- and adhesive-free construction. The metal-edged corners provide stacking strength. Nylon pull strings make it easier to retrieve the box from a shelf.