Hoover T-Series WindTunnel Bagless Upright Filter Kit - Includes Washable Filter Compare to Part 303173001, and HEPA Cartridge Filter Compare to Part 303172002 Includes 1 Primary Filter and 1 Exhaust HEPA Filter Filter Kit for Hoover WindTunnel T-Series Bagless Uprights, ncludes: Washable Filter Compare to Part# 303173001, and HEPA Cartridge Filter Compare to Part# 303172002 Envirocare Part # F290 & F285