Aircraft Model(s): PA-24-180 Comanche. Applicable Engines: O-360. 1 Polished Spinner 835-58P, 1 - STC Paperwork SA00631CH, 1 - 2-Bladed Propeller HC-C2YR-1BF/F7666A-4. 72 inch diameter Scimitar 2-bladed, aluminum hub propeller.