Steel/Fiberboard Literature SorterThis simple yet effective organizing tool has so many uses: a mailbox, material holder, stationery sorter, craft or office supply storage. Steel shell and support shelves add stability and durability. Letter size, 9 3/4w x 12 1/2d x 2 1/2h compartments are made from corrugated fiberboard. Wide shelf front serves as label area (labels included). Easy assembly with quick-locking fasteners. Literature Sorter Type: Open Front; Number of Compartments: 72; Compartment Size: Letter.