Replacement Blower Wheel, Product Type Replacement Blower Wheel, Wheel Type Radial, Number of Inlets 1, Wheel Diameter 12 1/4 in, Bore Diameter 1 3/16 in, Wheel Material Steel, Rotation CW/CCW, Hub Type Not Applicable, Wheel Hub Position Inside, Maximum Speed 4,676 RPM, Number of Blades 6, Blade Width 4.3 in, Includes Set Screws Yes, Includes Set Screws, Compatible with Grainger Part Number 3C539, Compatible with Brand Dayton