Fellowes 25002 4-Section compartment sorter, melamine laminated, letter size, dove gray Four-compartment desktop sorter includes labels and plastic channels. 200-lb. test corrugated fiberboard divider system. Constructed of 5/8" thermalfused melamine laminated particle board. For letter size materials. Compartment dimensions: 9 5/8w x 11 5/8d x 2 5/8h.