The Adjustable Depth 4-Post Rack supports equipment mounting depths from 23" to 42" in 0.5" increments to provide greater flexibility with a single part number. The front and rear structural posts of the rack are capable of mounting all Panduit Vertical Cable Managers and various accessories such as power distribution unit brackets, waterfalls and vertical tie-off panels. The rack has square hole, cage nut rails and is 45 RU in height. The rack is black in color.