The NetManagerâ„¢ High Capacity Horizontal Cable Manager cost-effectively organizes and protects copper and fiber network cabling in any standard EIA 19 inch (483mm) rack or cabinet. Large front finger openings easily accommodate Cat 6 and 6A cables, reducing installation time and maintenance costs. The single-sided manager is 4 RU and has a hinged front cover only. The manager is black. NMF4 HORIZONTAL CABLE MANAGER 4U