Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 1 31/32 in Height 2 3/8 in Depth 1 in Width 2 3/8 in CFM @ 0.000-In. SP 31.5 Watts 3.1 Voltage 24V DC - Hz 0.13 Amps Electrical Connection - Fans Lead Wires Sound Level 41 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Zero Friction Air 6100 RPM Motor Design DC Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F Blade Material Polybutylene