The APC NetShelter SX is a 48U server rack enclosure - a physical cabinet for mounting servers, switches, patch panels, PDUs and other rack-mount IT equipment, rather than any active/powered device itself. At 48U it's a tall, high-density enclosure suited to a proper data centre or comms room build-out rather than a small office rack. This unit measures 600mm wide by 1070mm deep, the deeper-than-standard depth needed to accommodate longer modern servers and cable management alongside them. The NetShelter SX line is APC's established enterprise rack platform, generally featuring perforated doors for airflow, adjustable mounting rails and side panels for cable and airflow management, though this listing doesn't itemise which accessories (doors, casters, PDUs) are included - buyers should confirm the exact bundled contents before purchase.