This 4 post server rack offers the familiar Telco equipment features of the standard 2 post steel racks, with the added feature of a stronger, more durable, and easy to assemble 4-point mounting system. This is ideal for extra deep and/or heavier servers, hubs, routers, or power supplies. The DSR24-36 is extremely flexible with its ability to adjust from 21" - 35" in 1" increments