Middle Atlantic RLA-CC Cable DuctRLA CC Series managers mount on all MK, R2, RL, RLA and R4 Series 45 space open frame rack systems, while providing abundant cable pass throughs and cable lacing points. Order 2 (two) single ducts to make an economical dual channel organizer. The solid hinged front door with a 3 point magnetic latch can be installed to open in either direction.