Modular Enclosure Panels are easily adaptable to standard shelving units to create a secured storage area. Panels are fabricated from 6 gauge Wire on 3" x 3" squares. Modular enclosure panels work with three shelf depths: 18", 21" an 24" and two heights: 63" and 74". One modular enclosure panel is needed for each side and two panels are needed for the back. Finish: Chrome.