The W1G180-AB31-01 is a 24VDC Axial Fan with a ball bearing and black PA6.6 plastic impeller. This W1G180 series tube axial DC fan features die-cast aluminum housing, electronically commutated external rotor motor, fully integrated commutation electronics and electronic protection against reverse polarity and locked rotor. The power connection is via leaded wires (+ve refers to red and -ve refers to blue). The rotational direction is counter clock wise direction looking at rotor and the air exhaust over struts.