Black Cable Runway Elevation Kit, Rack Aplication. Supports cable runway above a continuous row of two and four post racks or cabinets of varying heights, and provides additional space between the tops of the racks or cabinets and the cable runway, whi ch can create smoother cable transitions. Three ranges of incremental elevation Can be mounted perpendicular or parallel. Rack kit includes a single pair of brackets and assembly hardware. Rack kits attach to the top of the rack with a Rack-to-Runway M ounting Plate (BLRTR595-9B, -15B), sold separately.