LifeSupplyUSA Humidifier Filter for Kaz WF813 Wicking Filter WF813-24R, ReliOn RCM-832 and RCM-832N Fits Kaz WF813 Wicking Filter WF813-24R, ReliOn RCM-832 and RCM-832N For best results, change air filter at least once per season or more often depending on air quality and use. Honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home Brand New Individually Sealed Designed & Engineered by LifeSupplyUSA