16 Drawer Cabinet, Rugged, High Impact Polystyrene Frame Resists Damage In Shipping and Storage, Frame Back Interlocks Into Face Of Cabinets To Endure Abuse and Extreme Temperatures, No Glued Backs To Fall Apart, Cabinets Stack Or Wall Mount, 8 Dividers Are Molded Into The Back Of Each Cabinet, Additional Small and Large Drawer Dividers Are Sold Separately.