Holmes HAPF600D-U2 2-Pack HEPA Filter for Holmes HAP726 Type: HEPA Filter Used For: Air Purifier Feature: True HEPA filtration Helps remove up to 99.97% of airborne allergens as small as 0.3 microns from air passing through the filter Particles of that size include grass and tree pollens, household dust, pet dander, mold spores and smoke |