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Bard part number 5070-005 is an OEM drive belt used with the 5070-033 drive setup, specified at 41 inches, and it is designed to transfer motor torque to the driven component so your Bard wall-mounted unit maintains proper airflow and stable operation. A worn, stretched, or glazed belt can cause squeal, reduced blower performance, and inconsistent comfort, so replacing it with the correct Bard belt helps restore proper tensioning and reliable drive performance. Confirm belt length and the exact sheave arrangement on your unit before ordering, especially if the belt is being replaced due to misalignment or bearing drag that could shorten belt life.