Snap-in mounting provision holds cable manager in place while mounting screws are installed. Robust arrowhead fingers are shaped to funnel cables into base and are made of black composite material. Robust rounded end posts support cable as it enters and leaves cable manager and maintains proper cable bend radius. Deep cable compartments allow maximum cable density. Rounded edges throughout protect cable jackets from damage. Pass-through holes on double-sided models protect cable while facilitating routing between front and back sides. Single and double-sided units provide high cable capacity, including 5e, 6 and 6A cables. 1 RU and 2 RU heights allow greater flexibility in optimizing rack capacity. Removable hinged cover opens top or bottom, snaps closed for assured cable protection and professional appearance. Double-sided model has covers on both front and back. Covers stay open during installation and maintenance procedures. Horizontal and vertical cable managers designed as a system for streamlined appearance and improved functionality. Combination head 10-32 and 12-24 screws included for mounting.