Axial fans blow air along the axis of the fan, or parallel to the track of the blade axis. Standard DC Axial fan sizes include 60mm, 70mm, 80mm, 92mm and 120mm. The amount of airflow that a fan generates is measured in cubic feet per minute (CFM), and the rotational speed in revolutions per minute (RPM). Static pressure is measured as inches of water (H2O). DC axial fans are found in a variety of applications, including computing, servers, telecommunication cabinets, and any type of equipment where the need for thermal control is necessary for the improved reliability and life extension of the components that are included in the system.