Meet EIA standard for 19" racks. The optional Vented Quick-Release Shelf is independent of the mounting holes. Install i anywhere; no tools are required! The wiring troughs recessed into frame's front and back keep cables clear of shelf and rackmounted components. Open design enables airflow to equipment. Feature 45U in an 84"-high frame. The Action Organizer includes: (4) vertical rails (2) top angles (2) bottom angles (4) brackets to join the front and back sections (40) hex-head bolts and nuts (50) cage nuts and screws Stability and versatility. The Action Organizer provides solid, four-post stability for your equipment. Plus, built-in wiring troughs make cable management easy! Cabling to and from equipment and patch panels can be secured neatly in a rack's rails; away from power cords and the adjacent racks' cables. Optional joining kits, shelves, and cable management bring even more versatility to this adaptable rack. NOTE: Shipping is via motor freight.