The Kendall Howard Fan Assembly Kit helps to remove ambient heat that rack mount components can emit. Circulating new air into a wall mount cabinet or server enclosure helps to maintain the optimal temperature for devices such as servers battery backups and UPS's. Heavy-duty fan shroud ensures safe operationFeatures ball bearing for higher heat endurance and reduced noise emissionsThe competent 1 x 120 mm fan (s) is specially designed for standard cabinets