Study sorter made of 3/4" compressed wood with adjustable hardboard dividers. Stacks up to two high. Black plastic molding accent doubles as a label holder (labels included). Durable laminate finish complements any setting. Solid fiberboard back provides stability. 18 Compartments—Large sorting compartments accommodate oversized envelopes. Literature Sorter Type: Open Front Mail; Stackable; Number of Compartments: 18; Compartment Size: 4.88 x 11.75 x 10.25; Material(s): Compressed Wood.