LifeSupplyUSA 4 Pack Humidifier Filter B Fits Holmes HWF64, HM1645, HM1730, HM1745, HM1746, HM1750, HM2220 & HM2200, Fits Sunbeam SCM1745 & SCM1746 Bionaire Fits Humidifier Filter B Fits Holmes HWF64, HM1645, HM1730, HM1745, HM1746, HM1750, HM2220 & HM2200, Fits Sunbeam SCM1745 & SCM1746 Bionaire For best results, change air filter at least once per season or more often depending on air quality and use. Traps Water Impurities & Dissolved Solids Before They Become Airborne Brand New Individually Sealed By LifeSupplyUSA