The SRW21U SmartRack 21U Wall-Mount Standard-Depth Rack Enclosure Cabinet is ideal for storing standard 19-inch rack equipment in network closets, retail outlets, offices, classrooms and other areas with limited floor space where you need equipment to be secure and out of the way. Constructed from heavy-duty steel with a durable black powder-coat finish, it supports a maximum load capacity of 200 pounds. To ensure your valuable equipment stays safe and secure, the reversible front door locks with the included keys. The door and lockable, removable side panels are ventilated, which allows air to flow freely through the cabinet to keep equipment cool. Vented top and bottom panels help remove warm air from the enclosure and draw in cool air by convection. They also support the installation of Tripp Lite SRFANWM fans. The front door can open left or right by rotating the SRW21U 180° before mounting. Convenient top and bottom ports allow easy cable routing through the enclosure. The SRW21U comes fully assembled and ready to mount. Installing equipment within the enclosure is easy with its square and threaded mounting holes and numbered rack spaces. The front vertical mounting rails adjust in 7/8-inch increments to accommodate equipment from 3 to 16.5 inches deep.