Montana - Free Shelving 522000Montana Free Shelving system consists of 12 standard compositions that you can choose with an optional interposed shelf. The Free 522000 pictured here is the middle size, sitting 5 shelves high. The standard compositions range in size and function from the smallest design: a two shelf high bench that can fit under a window to the largest solution: a six shelf high unit perfect as both an airy and decorative room divider and a spacious shelving unit