Usage Tips: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 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 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. Value Pack: 6 premium humidifiers filters for HEV620 filter, cheap enough so you can simply remove and replace dirty filter. We suggestion that replace filter about every 2-3 months to maintain maximum filtering performance. Regularly replace filter to keep air clean. Colour: white and blue Material: HEPA Size: 19.5x16.5x3.3cm Package Contents: 6 x filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.