This 6-pack of 3M Filtrete 24" x 24" x 1" Dust Reduction filters, 3M Filtrete part #312 or #312DC-6, is the "economy" choice in the broad line of 3M Filtrete filters. The 3M Filtrete Dust Reduction Filter is a good choice if you need a very basic filter to capture large airborne particles regardless of your furnace brand. The 3M Filtrete Dust Reduction 24" x 24" x 1" #312 filter will capture dust particles but is not suited for capturing smaller allergen particles like pollen or mold spores. 3M Filtrete Product # 312 or 312DC-6 3M Filtrete Case UPC # 50051111025555 3M Filtrete Stock # 70071505427 To see a complete selection of genuine 3M Filtrete filter options, click here: 3M Filtrete Filters