Transformer Cooling Fan, Blade Diameter 20 in, Air Flow 6,600 cfm, Voltage 115/230V AC, 60 Hz, Phase 1, Fan Mounting Type Guard Mount, 4.1/2.1 Amps, 1,725 RPM RPM, Motor HP 1/2 hp, Max. Ambient Temp. 104 Degrees F, Bearing Type Ball, Number of Blades...