Fit Model: Replace for HFT600T HFT600PDQ HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W. Comfortable Life: A blue pre-filter layer protects the filter and capture large particle, helpful to maximize the filter's life. Premium filter capture minerals and pollutants to improve the air quality in your homes. Let your family living in a fresh indoor environment, improve breathing comfort. Excellent Performance: HFT600T filter captures minerals and pollutants from the water and helps prevent white dust, improve your breathing comfort. Easy to install and mounts accurately on your humidifier machine. Premium Filters: Made of environmentally friendly professional import heap filter paper, to help you get the most out of your humidifier. Premium filter stop white dust from hard water, keep air moist and make the air feel warm.