Product details:

Attractive bookcases with clean lines and rich wood-grain laminates complement all decors. Seven heights are available. Shelves standard ?" thick. 1" thick boards can be specified. Each bookcase is constructed of ?" thick solid-core furniture board with a 1/4" thick back panel and 36"W shelves that hold up to 30 lbs. each, evenly distributed. Shelves are 12"D and are adjustable in 1?" increments. Single-piece back panels and cam lock fasteners provide strength and stability.