The drive belt is a critical component of your vacuum that allows the brush roll to spin and help remove dirt and debris from carpets. Check drive belt regularly for wear or damage. PowerMax and Concept Style 30 belt. Compatible with Hoover Concept One, Concept Two, Self-Propelled PowerMAX, PowerDrive, DirtFINDER Uprights, including any units taking the 40201030 and AB-H-1050 belts.