The Tripp Lite SRFAN3U SmartRack 3U Fan Tray with 3 High Performance Fans is specially designed for use with Tripp Lite SmartRacks. It is ideal for increasing ventilation of SmartRacks, enclosures and server cabinets. Better airflow keeps your valuable rack components cool, helps boost system performance and avoids costly equipment failures that lead to downtime, damage and data loss. The SRFAN3U fan tray requires 3 rack spaces and includes 3 powerful 4 in. 120-volt fans that circulate air at 210 CFM. The 6 ft. AC power cord plugs into any NEMA 5-15R outlet.