Generic "V" type of belt that is suitable for: Self Propelled WindTunnel models. Also for use with Mach 5, Mach 6 and Mach, Pet Cyclonic Uprights. Fits 40201200, U5194900, U5198900, U5780900, U5781900, U64019RM, U6420900, U6434900,,U6436900, U6439900, U6445906, U6454900, U6471900, U6476900, U6476910, U6485900, U66009RM, U6607900, U6616900, U6617960, U6618900, U6630900, U6632900, U6634900, U6637900, U6637960, U8311900, U8315960, U8341900, U8341950, U8347900, U8351900, U8351950, U8361900, U8361950, U8371900, UH50000, UH50005B, UH60000, UH70010, UH70015, UH70040, U5780-900, U5781-900, UH70035, UH70085