Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 3 1/4 in Height 3 5/8 in Depth 1 17/64 in Width 3 5/8 in CFM @ 0.000-In. SP 63 Watts 3.5 Voltage 24V DC Electrical Connection - Fans Lead Wires Sound Level 42 IP Rating IP20 Mounting Position Universal Bearing Type Ball 3450 RPM Motor Insulation Class E Max Ambient Temp 167 Degrees F Blade Material Fiberglass Reinforced Plastic Housing Material Fiberglass Reinforced Plastic