COLD BIT 120 x 120 x 25mm12V/0.18A 7-BLADE SLEEVE BEARING AXIAL DC BRUSHLESS FAN [DFS122512L]. An axial fan, aka a propeller fan, is designed to move air or gas parallel to the fan's shaft. The spinning motion of the blades creates a low-pressure area behind the fan and a higher-pressure area in front of it.