Hoover Wind Tunnel Self Propelled Style 170 Replacement Vacuum Belt 2 Pack Hoover Flat Power Drive Windtunnel Upright Belt. Size 3 3/4" O.D. 2 Genuine OEM Hoover belts in pack. Manufacturer Part No.: 40201170 Fits the following Hoover Models: U64019RM, U66009RM, U6434900, U6436900, U6439900, U6445906, U6476910, U6630900, U6420900, U6471900, U6476900, U6616900, U6617960, U6618900, U6632900, U6637960, U6637900, U5194900, U5198900, U5780900, U6426900, U6607900, U6485900, U5781900, UH50000, UH50005B, UH70035B, UH70040, UH60000, UH60010, UH70085, UH60000W, UH70040W, U6485900B, U6485100, U6485200B, UH70086, U6485300B.