This welded assembly provides desk-top access to (19") control and monitor equipment. Model 400-21-962 is 16-gauge CRS and includes one pair of mounting rails, tapped 10-32, hardware and wiring access below rear door or panel. Model includes locking rear door with spring-loaded hinge, side vents and optional front door with self-tapping screws. Inside (usable) dimensions are 17 3/4" W x 14 1/8" D.