Holmes True HEPA Filter HAPF600D-U2, Filter B, 2 Pack Contains 2 True Hepa Replacement Filters that remove up to 99.97% of airborne particles as small as 0.3 microns from air passing through the filter Fits Holmes models: HAP615, HAP625, HAP650, HAP675RC, HAP725, HAP750, HAP1625, HAP1650, HAP1725 and HAP1750 Also fits Holmes models: HAP616, HAP633, HAP653, HAP726, HAP756, HAP759, HAP8615, HAP8650 and HAP9726 Fits Bionaire models BAP260, BAP815, BAP825, HAP1225 and BAP125 99.97% Hepa Filtration