Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 2 in Height 2 21/64 in Depth 1 in Width 2 1/3 in CFM @ 0.000-In. SP 33 Watts 3.6 Voltage 24V DC 0.15 Amps Electrical Connection - Fans Lead Wires Sound Level 43 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Ball 8200 RPM Motor Insulation Class E Thermal Protection Electronic Max Ambient Temp 158 Degrees F Blade Material Fiberglass Reinforced Plastic PA