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