Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 4 1/8 in Height 4 11/16 in Depth 1 1/2 in Width 4 11/16 in CFM @ 0.000-In. SP 115/95 Watts 20 Voltage 115V AC 60/50 Hz 0.25/0.28 Amps Electrical Connection - Fans Terminals Sound Level 49/44 IP Rating IP20 Mounting Position Horizontal Bearing Type Sleeve 3100/2700 RPM Motor Design Shaded Pole Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F Blade Material Polybutylene