Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 4 1/8 in Height 4 21/32 in Depth 1 1/2 in Width 4 2/3 in CFM @ 0.000-In. SP 162 Watts 21 Voltage 24V DC 0.88 Amps Electrical Connection - Fans Lead Wires Sound Level 60 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Ball 6000 RPM Motor Insulation Class E Thermal Protection Electronic Max Ambient Temp 149 Degrees F Blade Material Fiberglass Reinforced Plastic PA Housing Material Aluminum