HP: 1/40 Amperage: 0.75 A CFM: 136 Bearings: Ball Voltage: 115 V RPM: 2480 Electrical Type: PSC Outlet Shape: Rectangular Flanged Enclosure: ODP Phase: 1 Rotation: CW Material: Galvanized Steel Frequency: 50/60 Hz Wheel Diameter: 4 1/8" Current: AC Wheel Width: 1 7/8" Flange: 4 7/16" x 4 1/16" Outlet Height: 2 5/8" Outlet Width: 2 15/16" Inlet Diameter: 3 3/4" Number of Inlets: 1 Duty: Continuous Motor Diameter: 3.3" Noise and Vibration are Held to a Minimum to Maintain cfm at Higher Static Pressures; the Motor has Cast Aluminum End Shields for Greater Heat Dissipation and Protection, Resulting in Less Downtime and Longer Service Life; This Dynamically Balanced Double Blower Provides Smooth and Quiet Operation