Tier1 Replacement for Holmes HWF75PDQ-U HWF75 Typer D Models HWF75CS Humidifier Filter DESIGNED TO FIT: Fits Holmes humidifiers requiring HWF75PDQ-U filter, models HWF75CS, HWF75, HF222, HM3500, HM3600, HM3650, HM3640, HM3641, HM3655, Bionaire BCM3656-UM, W12, W14, W15, Sunbeam SCM3501, SCM3502, SCM3657, White Westinghouse WWHM3300, WWHM3600. ACTUAL SIZE: 14 inches (height) x 2-1/2 inches (width) x 3-3/10 inches (depth). HIGH EFFICIENCY FILTRATION: Reduces pollutants from the water treated to inhibit the growth of mold, bacteria, algae, and fungus. FILTER LIFE: For optimum performance, replace every 2 months. 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Reduces static Eases cold and allergy symptoms Soothes sore throat and dry, irritated skin Creates a comfortable living environment Reduces chance of nose bleeds Alleviates snoring for better sleep RB-HL72R B HL72R BHL72 Algae Bacteria Fungi Mold Spores