From the air your vacuums pulls through the bag, Filtrete Micro Allergen vacuum bags capture 94% of particles larger than 1 micron size, including dust mite debris grass, and ragweed pollen. They also capture 57% of particles between 0.3 and 1 micron in size, including household fibers and other microscopic allergens. Fits Eureka 200, 600, 1400, 1900, 2000, 4000 (except 4300 - 4600), 5000 (except 5180 - 5190 and 5700 - 5800) series upright. Sanitaire SC600 and SC800 series without tube extension. 3 bags per package. No. 67715B-6: Type: F & G, Filtration Type: Micro Allergen, For Use With: Most Eureka and Sanitaire models, Pkg Qty: 3, Package Type: Hang Tag Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!