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 138 cfm, Watts 20/22 W, Voltage 115V AC, 60/50 Hz Hz, 0.24/0.26 A Amps, Electrical Connection - Fans...