Blower Wheel Product Type Blower Wheel Wheel Type Forward-Curved Number of Inlets 1 Wheel Diameter 4 in Wheel Width 2 1/2 in Bore Diameter 1/4 in Wheel Material Steel Rotation CCW Closed End Hub Type Convex Wheel Hub Position Inside Wheel Construction Tabbed Maximum Speed 3 600 RPM Drive Type Direct Drive Includes Set Screws Yes Wheel Material Finish Galvanized