3-13/16 x 1-7/8 x 5/16 CCW replacement blower wheel Fasco 1-6043Part Number:
Steel blower wheel for Duo-Therm booster motor (among others). Wheel measures 3-13/16" diameter x 1-7/8" deep. 5/16" center hole with set screw. Rotates clockwise when looking from the back of the motor. 3200rpm max. Also known as W69-178 and Packard BW16043.