Holmes HAPF600U3 Replacement Modular HEPA Filter for Air Purifiers, 10 x 6 1/2 x 2 HLSHAPF600U3 HLS HAPF600U3, Helps remove 99.97% of particles as small as 0.3 microns from passing through the filter. Captures unpleasant odors and common allergens. Maintains consistent high performance over time. Replacing the HEPA filter at least once a year is recommended. Filter Type: HEPA; Filtration Type: HEPA Filter; Filtration For: Dust; Dust Mite Debris; Mold Spores; Odors; Pet Dander; Pollen; Smoke; Width: 10 in. UPC 048894170218