Feature-rich rack enclosure optimized for easy installation, managing cables, integrating power distribution, and maximizing airflow. Includes: Baying hardware, Key(s), Keyed-alike doors and side panels, Leveling feet, Mounting hardware, Pre-installed casters, Side panels. Split rear doors improve access and serviceability to rear of rack mounted equipment. The split rear doors help to maximize floor space. Only 11 inches (279 mm) of clearance is required behind the enclosures to allow for door swing. Enclosures include pre-installed joining hardware to join enclosures in a row and provide additional stability to the enclosure. Enclosures are shipped standard with both leveling feet and castors. Leveling feet can be quickly adjusted through the use of a screwdriver or drill, eliminating the need to reach underneath with a wrench. Integrated and adjustable rear accessory channel provides zero U mounting locations for toolless accessories. Each channel has two mounting bays to support a combination of up to four accessories such as PDUs and vertical cable organizers. Enclosures with shock packaging are standard enclosures with provisions in the packaging design and enclosure assembly for shipping the enclosures with equipment mounted inside.