It is vertical cable manager for for 60"H Cube-iT. The patented Cube-it Plus Cabinet System is a series of wall-mounted and floor-supported telecommunications enclosures designed to secure communications equipment for a cross connect.
Use in 60”H (1520 mm) and 72”H (1830 mm) cabinets only
Openings align with RMU spaces; fingers manage patch cords
2.7”W x 5”D (69 mm x 130 mm) usable interior space
Adjusts front-to-rear within the cabinet
Managers must be installed before rack-mount equipment