Steel shell and support shelves with a solid fiberboard back ensure stability and durability. Compartments are formed with heavy-duty corrugated fiberboard. Unit has thirty-six oversized 9-3/4"W x 12-1/2"D x 2-1/4"H compartments that will hold up to 550 individual sheets. Compartments are wide enough to easily accommodate letter-size file folders. Wide shelf fronts have built-in label holders (labels included). Available in Black, Gray and Sand baked enamel finish or Medium Oak woodgrain finish on steel. Quick-lock assembly.