Comes with mounting ears pre-assembled for quick installation. Full extension lockout shelf allows for easy maintenance of your components right on the shelf. Allows access to cable, wiring and connections from the front of the enclosure. Optional lightweight removable cover panel. 3 front-to-rear rail mounting ranges: – 12-1/2” to 16-3/8” – 23” to 26-3/4” – 27-3/8” to 29-1/8”. 23-1/8” overall depth and 23” useable depth with foot holes. Durable steel construction with black finish