Tennsco Metal Bookcase, Six-Shelf, 34-1/2w x 13-1/2d x 78h, BlackCommercial-grade steel construction provides years or reliable storage. Shelves adjust in 2" increments. Powder-coated finish. Four-shelf unit has three extra-deep 13 1/2" adjustable shelves that raise and lower. Rounded top edge. Color: Black; Material(s): Commercial Grade Steel; Shelf Count: 6; Overall Height: 78".