This SmartRack® 12U Mid-Depth Rack Enclosure Cabinet is designed to simplify rack equipmentinstallations and rack equipment maintenance. Compatible with all standard 19-inch rack equipment, itfeatures front and rear pairs of vertical rails with square mounting holes. The rails are adjustable inquarter-inch increments to accommodate equipment depths from three to 32.5 inches, ideal for standardserver installation. The rails are capable of supporting up to 1,000 pounds (453.6 kilograms) of equipment.The top and bottom panels are provided with ports for cable routing, and are furnished with ventsdesigned to help remove warm air from the enclosure and draw in cool air by convection. The panels alsosupport installation of standard user-supplied case fans (SRFANWM, sold separately). With a lockingreversible front/rear doors and locking removable side panels, the SR12UB provides for the safe, secureinstallation of all equipment. To simplify deployment, the SR12UB comes with an accessory caster kit so itcan easily be maneuvered into the desired location, and then secured in place by adjusting the unit'slevelers. It ships fully assembled for quick installation.