Final Filter for Hoover Windtunnel Pleated HEPA w/activated Charcoal Vacuum Filter, Upright, Self propelled Vacuum Cleaners Fits: Hoover Upright, Self propelled WindTunnel (1) Hoover WindTunnel Self Propelled HEPA w/activated Charcoal Filter Fits original manufacture part numbers below: 40120101, 3613021, 43613-022, H-40120101, H-43613021, STR42651 EnviroCare Premium aftermarket Part #918