The Middle Atlantic 5CC29-26 is a cable chase accessory that provides additional space for wiring and power distribution between bays. It is designed to enable the use of doors and split rear rail with ganged racks. The 5CC29-26. Includes front, rear, top channels, and mounting hardware, making it easy to install and use. With this accessory, you can easily manage your cables and create a neat and organized setup for your equipment.