37" CARDBOARD (Corrugated Fiberboard) Roll Files - An economical way to organize and store drawings, charts, plans, blueprints, maps and other rolled materials. Corrugated fiberboard shell is two layers thick and reinforced by a steel frame. Square tubes offer easy removal of contents and are reinforced with black plastic molding. Dust-resistant doors keep materials clean. Index grids for easy identification of contents. Tropic sand color, complemented by black handles. Has 16 slots.