Glassroll Fabrication’s harp rack for low-emissivity glass measures 72 inches deep, 55 inches wide and 53 inches high on the back side. The rack contains 50 slots, all 3/8-inch, numbered one to 50. The base of the rack is covered with slotted high-density polyethylene resin. Other features include two swivel casters, two rigid casters and a floor lock.