Tier1 Replacement for Holmes HWF64 B Models HWF64CS HM1730 HM1745 Humidifier Filter DESIGNED TO FIT: Fits Holmes humidifiers requiring HWF64 filter, models HWF64CS, HM1730, HM1745, HM1746, HM1750, HM2200, Sunbeam SCM1746, SCM1747, Bionaire BWF64CS ACTUAL SIZE: 6-1/2 inches (height) x 7 inches (width) x 1 inch (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-HL64 RB HL64 RBHL64 HMF1080 TIER1-HMF1080 Algae Bacteria Fungi Mold Spores