Divider system keeps your forms, sales literature or active documents at your fingertips. Sturdy 200-lb. test corrugated fiberboard divider system includes plastic channels and labels. Constructed of 5/8" thermal fused melamine laminated particle board. For letter size materials. Compartment dimensions: 9w x 11 7/8d x 2 5/8h. Overall 29w x 11 7/8d x 12 15/16h. Number of compartments 12.