Hoover "SR" Vacuum Bags for Duros / Canisters #401010SR- Generic - 3 pack Generic Micro Filtration Hoover SR bags Traps 99.98% of ragweed and common grass Pollens. Filters a wide range of airborne particles including many pollens, cat dander, spores and other allergens. Ideal for many with allergic or dust related discomforts. Quantity Per Package: 3 Hoover vacuum cleaner bags