Strong steel exterior and shelf construction together with a solid fiberboard back. Attractive, plastic snap-in radius corners make assembly easy and add to the overall strength of these units. Shelves adjust at 1" intervals during assembly. Generous 12" deep shelves accommodate 3-ring binders and large publications. Fixed bottom is counted as a shelf. Case measures 31-3/4"W x 13-1/2"D. Choice of printed steel in Medium Oak or baked enamel finishes in Black, Gray or Sand. Easy assembly with quick-lock fasteners.