The 8312HL is DC axial fan, Clockwise rotation viewed from rotor, air output over struts. Electrical connection via two leads, AWG 22, TR 64, 12.2" (310 mm). Features: Totally Encapsulated and Totally Sealed Fan of Fiberglass Reinforced Plastic PBTB Housing PA Impeller Electronically Commutated DC Motor Mass: 6.1 Oz. (173 g) Ball Bearing Construction Air Flow : 39.4 CFM (1116 L/Min.) Configuration : Square Dimensions : 3.2 x 3.2 x 1.26 In. (80 x 80 x 32 mm) Material : Plastic Noise Level : 43 dBA Power Rating : 4 W Temperature, Operating, Maximum : 75 C Temperature, Operating, Minimum : -20 C Termination : Wire Leads Voltage Rating : 12 VDC Weight : 0.38 Lbs.