Standard Square Axial Fan, Fan Shape Square, Mounting Eye O.C. 4 1/8 in, Height 4 11/16 in, Depth 1 1/2 in, Width 4 11/16 in, CFM @ 0.000-In. SP 230, Watts 45, Voltage 24V DC, 1.88 Amps, Electrical Connection - Fans Lead Wires, Sound Level 70, IP Rating IP20, Mounting Position Vertical or Horizontal, Bearing Type Ball, 7500 RPM, Motor Insulation Class E, Thermal Protection Electronic, Max. Ambient Temp. 149 Degrees F, Blade Material Fiberglass Reinforced Plastic PA, Housing Material Aluminum