Most new vacuum belts will be drastically different in size (usually smaller and wider) than the used belts. This is due to the fact that belts stretch and wear as they are used. Most new belts usually require the belt to be pulled and stretched into place.  
 

Replacement brush roller belt for Hoover WindTunnel Self-Propelled uprights, including model U5491900 UH50000 and UH60000 . This Style 200 belt (Part #38528-034) is essential for the brush roll to agitate and lift debris from carpets. Fits a wide range of WindTunnel 1 and 2 series with self-propel functionality. Replaces 40201200. Durable rubber ensures peak suction and cleaning power.