The Middle Atlantic 5AR29 is a mounting accessory designed for use with the 29RU Slim 5 Racks, providing 22RU of additional mounting space. The adjustable, split design of the 5AR29 allows for mid- and rear-hanging support, making it a versatile option. The accessory works with all side panels, so it is compatible with most 29RU Slim 5 Racks. However, when used with ganged racks, a cable chase kit is required. The 5AR29 includes all necessary brackets, rails, and hardware, making it easy to install. With this accessory, you can easily add more mounting space to your 29RU Slim 5 Racks and create a custom solution for your equipment needs.