Keep your air humidifier operating at peak efficiency with the Holmes Air Humidifier Filter B. This triple-layer humidifier filter helps control dust and dirt buildup inside your humidifier. It also effectively traps mineral deposits found in tap water, helping prevent impurities from spreading into your home. Antimicrobial protection inhibits the growth of mold, mildew, and odor-causing bacteria, while an exclusive Arm & Hammer Baking Soda layer helps remove household odors, so you can enjoy the renewing effects of clean, moist air in your surroundings. It is designed for use with Holmes HM1730, HM1745, HM1746, HM1750, and HM2200 and Sunbeam SCM1746 model humidifiers.