Blower Wheel Product Type Blower Wheel Wheel Type Forward-Curved Number of Inlets 2 Wheel Diameter 7 3/4 in Wheel Width 3 7/8 in Bore Diameter 1/2 in Wheel Material Plastic Rotation CW/CCW Hub Type Concave Wheel Hub Position Center Maximum Speed 1 550 RPM Drive Type Direct Drive Includes Set Screws Yes