Replacement Blower Wheel, Product Type Replacement Blower Wheel, Wheel Type Radial, Number of Inlets 1, Wheel Diameter 13 1/2 in, Bore Diameter 1 1/8 in, Wheel Material Aluminum, Rotation CW/CCW, Hub Type Not Applicable, Wheel Hub Position Center, Maximum Speed 3,500 RPM, Number of Blades 6, Blade Width 4.3 in, Includes Set Screws Yes, Includes Set Screws, Compatible with Grainger Part Number 4C330, Compatible with Brand Dayton