Molded one-piece polypropylene construction with an integral living hinge. Numbering in the base corresponds to the printed index in the covers for slide identification purpose. Boxes are designed to be stackable to save space. The tensioned clasp insures a secure closure.
The attached lid is held securely by a closed latch lock. Stacking feet maximize the stability when boxes are stacked up one atop the other. Comes complete with a numbered slide index card.