Hoover Windtunnel Air Geared Vacuum Belt 562535001. 

3M-201-6.5 written on belt. 

Fits Hoover Models: UH70400 UH70405 UH70401 UH70403 UH70404 UH72409 UH72400 UH72405 UH72406 UH72402. 

Also works on Shark Navigators. 

Manufacturer Part No.: 562535001    

H-562535001