Hoover WindTunnel Uprights Secondary Under Bag Filter 38765019 Filter, Secondary Under Bag Windtunnel Uprights. Fits Hoover Models: U5344-900, U5347-900, U5347-960, U5348-900, U5349-900, Hoover3, U5395-900, U5421RM, U5433-900, U5444-900, U5445-900, U5465-900, U5465-960, U5473-900, U6439-900, U6454-900, UH50000, UH50000B, U6446-900, U6425-900, U6445-900, U6451-900, U6455-900, U6449-900, U5458-900, U5462-900, U5460-900, U5468-900, U5470-900, U5467-900, U5472-900, U5481-900, U5491-900, U5491-950, U5471-900, U5458-910 Manufacturer Part No.: AH41001