Oreck ET511PK Paper Bag, Dutchtech Can. W/Pre & Post Filters 5Pk Saniseal system allows the user to completely seal the opening of the vacuum bags first, before removing the bag, which prevents any mess Replacing the pre-motor, and exhaust filters at least once every 5 bags Life expectancy of your vacuum cleaners motor is a direct result of maintenance to your motor filter Package contains 5 disposable filter bags, 1 motor filter and 1 exhaust filter