4 - Hoover WindTunnel Air Model UH70400 HEPA Vacuum Filters. Designed by FilterBuy to replace Hoover Part # 303902001. 4 Allergen Hepa Vacuum Filters Premium Allergen Filters Designed by FilterBuy to fit Hoover WindTunnel Air Model UH70400. Also compatible with the following Hoover models: UH70400BCA, UH70400CA, UH70400FDI, UH70400PC, UH70400PDI, and UH72405. Replaces Hoover Part # 303902001. Vacuum FilterBuy: Breathe Better!