The RACK-21U-20-WALL-OA 21U Open Frame Wall Mount Equipment Rack with Adjustable Depth is a high-quality, sturdy relay rack solution that is easy to assemble and install into any environment. Sturdy Construction & Easy InstallationThe open rack features an adjustable depth ranging from 12-20 inches to accommodate larger data, network, and telecommunications devices. With a maximum depth of 20 inches, this rack allows for mounting of shelves and other accessories with enough clearance at the back for cable management. The open-frame design help to keep your equipment cool and easily accessible from different angles. The wall mounting holes are positioned 12 and 16 inches apart (center to center) providing a convenient and effecting anchoring, making it suitable for mounting on virtually any wall surface or construction framework. Includes HardwareThis 21U rack includes M6 square cage nuts and M6 screws to save you the hassle of sourcing separate mounting hardware for your equipment. This rack can be mounted to the wall in a server room, data closet, or office expanding your valuable floor space. The RACK-21U-20-WALL-OA is backed for 5-years by StarTech.com, including free lifetime 24/5 multi-lingual technical assistance.