Can be used as a four-tier single tower rack or two, two-tier racks to meet your specific needs. Shelves adjust in 1" increments and support 1000 lbs. (evenly distributed). Includes four shelves, four 1" four-section poles (total height 71"), eight plastic top pole caps, four feet inserts, four feet screw inserts, eight adjustable feet levelers, 12 metal pole connectors and 18 sets of plastic tapered locks. 72" high. Manufacturer’s five-year limited warranty. Assembly required.