This is a BRAND NEW Rheem/Ruud/Weather King/Corsaire Squirrel Cage or Blower Wheel. The part # is 70-18641-01. It's 13" in diameter, and 9.5" tall with a 3/4" bore. If the set screw is facing up (as in the picture), it rotates Counter Clock-Wise. Thanks for looking and good luck!
Partial List of Rheem/Ruud/Weather King/Corsaire Units using this Squirrel Cage: