Overview The high speed 172 by 150 by 51 millimeter 110/220 AC axial fan is housed in die cast aluminum with thermoplastic blades. Containing long life dual ball bearings, the fan can run continuously for 50,000 hours and be mounted in any direction. Includes a 4 foot power cord which allows the fan to be plugged into a standard outlet;  AC Infinity fans are certified by CE, UL, TUV, and RoHS; and found in various Samsung and Eaton servers and UPS systems. High Speed High speed fans deliver more air but are louder than low speed fans of the same size. They are more suitable in applications where maximizing airflow is the primary objective and a louder noise level is tolerable. Applications This is the most popular size and can be found in noise tolerant applications such as tanning beds, LED signs, server racks, industrial machinery, arcade systems, and more.