This 42U server rack cabinet ships fully assembled with 200 M6 cage nuts and screws to mount equipment immediately. The mounting rails can be adjusted from 3 to 37 in. (76.2 mm - 939.8 mm) to support full-depth equipment and the extra width and depth provides space for additional cable and power management. To keep your rack-mounted equipment secure, this rack features front and rear locking mesh doors that also increase airflow to promote passive cooling. The removable side panels with independent quick-release locks provide access to your equipment easily, while still keeping it secure. The portable server rack enclosure features casters, providing ease of mobility around your office, studio or server room. Plus, the width and height of the rack fit through standard doorways, giving you the freedom to wheel your server rack into different rooms as needed. We offer a wide selection of products that help you optimize your server rack storage space, to improve space efficiency, accessibility and convenience. This mobile server rack cabinet is backed by a 5-year Manufacturer's warranty and free lifetime Manufacturer's North American based technical support.