Sturdy, all- steel units store literature and file folders, can be vertically stackedAll racks are constructed of prime cold-rolled steel with a tan, powder-coated, baked enamel finish. These racks are rigid, will not warp or twist and are shipped set up, ready for use. They can be stacked vertically using the pre-drilled mounting holes. Rubber feet are also provided for use with desktop units.Individual racks are available with 9, 12 or 15 openings. FOB: CTOverall dimensions:B431 (9 pockets): 10 3/4H x 33 3/4W x 11 5/8"DB432 (12 pockets): 14 1/4H x 33 3/4W x 11 5/8"DB434 (15 pockets): 17 1/2H x 33 3/4W x 11 5/8"DAll pockets are a fixed size of 3H x 11W x 11 1/2" D.