APC by Schneider Electric ACF001 Airflow Cooling System - 503 CFM - Black - 3500 W - Black - 2U - 120 V AC - 2 A - 240 W

Fan guards - A safety measure that provides protection from the fan opening by covering the inlet. Mounting rails - Adjustable depth allows the unit to fit APC NetShelter enclosures or other 19in" EIA-310-D enclosures. Dual fans - Provides fault tolerance in the event of a fan failure. Fan control switches - Users can turn one or both fans on and off depending on the heat load. Promotes Proper Airflow - Helps to maintain proper rack temperatures within the enclosure by promoting top to bottom airflow movement.