Ka 710465376083 Protec WF2 Extended Life Replacement Humidifier Filter (3-Pack) Strong Antimicrobial Protection For use with Vicks Natural Mist Models V3100, V3500, V3600 and Kaz HealthMist Model 3020. Removes Minerals and Pollutants from Water Antimicrobially Treated Filter - Helps prevent the growth and migration of mold, algae and bacteria on filter Easy to use