The 1004KL-01W-B40-B00 is a 5VDC Axial Fan with ball bearing and wire leaded power connection. This K-series axial fan comes with plastic (black) casing and impeller. UL1061, 26AWG red (+) and black (-) lead wire. Clockwise direction of rotation, air out over struts. Brushless type DCM motor function, standard special control function and standard model ribbed mounting. Can be an integral part of a cooling solution for heat-generating purpose.