Fiber management Supports toolless installation of AR8444 fiber spools. Cable protection Smooth plastic fingers provide proper bend radius. High capacity cable finger design Cable managers feature high capacity slim cable fingers to provide maximum capacity at every rackspace unit & a rigid design to decrease deflection when cables are routed in/out of the cable manager channel. Horizontal cable routing front-to-back Pass-through holes & mounting slots support horizontal cable troughs for front-to-back cable pass-through using cable management accessory AR8016ABLK. Cable management tie-off backplate for accessories Backplates feature multiple mounting holes for toolless accessory installation of cable management accessories such as hook-&-loop cable managers & straps (AR8621) & fiber spools for excess fiber slack management (AR8444). Dual-hinging full length door Door installs quickly without tools & hinges from the left or right to allow access inside the vertical cable manager channel. Unassembled for rapid assembly onsite Vertical cable managers are packaged unassembled & designed with a simple snap together design for rapid onsite assembly & installation.