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The Bard 5151-033 fan blade is an OEM 18 inch, 3 blade condenser fan prop designed for counterclockwise rotation to move the correct volume of air across the outdoor coil in Bard wall mounted and packaged HVAC units. Replacing a bent, cracked, or out of balance blade with the proper Bard part helps restore stable airflow, protect the fan motor from excess vibration, and maintain normal head pressure for reliable cooling performance. Verify rotation direction, diameter, and hub bore match your existing blade before ordering, since installing the wrong pitch or rotation can reduce airflow and strain the system.