Middle Atlantic MRK-4442LRD 19 inch Multibay Gang-Able Rack EnclosureFeatures Fully welded construction provides a 2,500 lb. weight capacity 1 8" thick structural steel internal braces 22" OD width with multiple depths available 1 2", 3 4", 1" & 1 1 2" electrical knockouts on split rear plates top & bottom, easily removable for cable pass through, top plates additionally include UHF VHF knockouts Two wide pairs of 11 gauge, 10 32 threaded rackrail with numbered rackspace increments Optional solid, fully vented, plexi