... parallel to the track of the blade axis.Standard DC Axial fan sizes include 20mm,30mm,40mm,50mm,60mm,70mm,80mm, ... and inductive DC Fan,DC Fan Cooler,AC fans,Cooling fan,Axial Fans,Brushless FAN,Blowers Fan,humidifier Fans,Purifier Fan,LED Fan,AC Fans,Cross- ... flow Fan,Mini Fans,super fan. 1).Size ...