Middle Atlantic SRSR Series 21RU Slide Out Rotating Rack Rail System - 19.1in Depth Wall Mounted RackExperience effortless rear access to your equipment connections with the Middle Atlantic SRSR Series 21RU Slide Out Rotating Rack Rail System. This wall mounted rack system is purpose built for millwork, cabinets, and flush in wall installations, delivering a compact yet capable solution that keeps gear organized, accessible, and secure. With a 21U rack capacity, a slide out mechanism, and a 90 rotation in either direction, the SRSR is ideal for