Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 3 1/4 in Height 3 5/8 in Depth 1 in Width 3 5/8 in CFM @ 0.000-In. SP 45 Watts 1.7 Voltage 24V DC - Hz 0.07 Amps Electrical Connection - Fans Lead Wires Sound Level 33 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Ball 2700 RPM Motor Design Brushless DC Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F Blade Material Polybutylene Terephthalate