In tackling your case's cooling needs, there is no 'one fan fits all.' Each of the three 120mm fans in the MasterFan Pro series provides a specific air cooling solution while all being fitted with multiple layers of our exclusive noise reduction technology and adjustable speed profiles. Put together, they work in harmony to cool your entire case and its components. Air Flow fans are ideal for exhausting large volumes of air quickly out of the case. We recommend them for use on the rear or top panels.