EnviroCare Replacement 3 layer Final Vacuum Filters for Hoover WindTunnel Self Propelled, Bagless, Upright, Widepath, Empower, Foldaway, PowerMax Vacuum Cleaners, 2 Filters Hoover WindTunnel Self Propelled 3 Layer Final Vacuum Filters Bagless, Upright, Widepath, Empower, Foldaway, PowerMax Vacuum Cleaners 40110006, 38766021, 38766-021, H-38766021