Hoover 

For Hoover Allergen Filtration System

40110004

38766-009

Package of two filters 

Genuine Hoover

Fits : but may not be limited to

All Non Self Propelled WINDTUNNEL Uprights

and

Hoover Bagless (non WindTunnel) Vacuums with The Hoover Allergen Filtration System

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Have A Great Day !!