EBayhumidifier wicking fFilters. Compatible with HFT600T, HFT600PDQ, filter T contains 6 blue mesh upgraded humidifier wicking filters  compatible with HFT600 series, HEV-600 series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W, compare to part # HFT600T & HFT600PDQ  Compatible with Honeywell HFT600 series and HEV-600 series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W Comfortable use: The blue pre-filter layer can completely filter, helping to maximize the service life of the filter. High-quality filters captures mineral from hard water to stop white dust,improving the air quality of your home. Let your family live in a fresh indoor environment. High-quality materials: The professional environmental protection imported blue filter paper has a diamond-shaped grid structure, which can ensure the maximum transmission of water and absorption of products. The newly upgraded blue grid appearance enhances product performance and further ensures the cleanliness of the product Easy to install and replace-For best performance, it is recommended to replace the filter every 1-2 months. Replace the filter regularly to make the air feel moist and warmer can help improve your breathing comfort, dry skin and sleeping. Friendly service: each blue humidifier filter is individually packaged with good quality. If you have any questions about this product, please feel free to contact us. We are committed to providing the best quality products and promise to provide 100% quality customer service