Value Pack - Premium replacement for HFT600 Filter T filters for your HEV615 & HEV620 humidifiers. Made from high-quality, durable material with an upgraded filter design to both filter large particles and maximize moisture output Upgraded Blue Pre-Filter Layer - Our premium upgraded blue layer pre-filter helps reduce the quantity of large particles circulating in your air Compatible With for Humidifier Filters Replacement Filters - Compatible with HTF600 Filter & Filter T. Precision designed and manufactured for humidifier models HEV615 & HEV620 Tips For Daily Use - For best results, flip your compatible for humidifier T filter daily and only fill humidifier tank with distilled water (this applies to all of filters). Hard water degrades ALL compatible for humidifier filters and yellows them prematurely Installation Instructions - Soak your replacement wick for T Filter for humidifier HEV615 and HEV620 in cool water before replacing to ensure uninterrupted moisture output. Place in filter housing with blue layer facing outwards (towards you) Material:wood pulp paper colour:Blue Package Contents: 4 * filter elements 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. Value Pack - Premium replacement for HFT600 Filter T filters for your HEV615 & HEV620 humidifiers. Made from high-quality, material with an upgraded filter design to both filter large particles and maximize moisture output Installation Instructions - Soak your replacement wick for T Filter for humidifier HEV615 and HEV620 in cool water before replacing to uninterrupted moisture output. Place in filter housing with blue layer facing outwards (towards you) Tips For Daily Use - For best results, flip your compatible for humidifier T filter daily and only fill humidifier tank with distilled water (this applies to all of filters). Hard water degrades ALL compatible for humidifier filters and yellows them prematurely Upgraded Blue Pre-Filter Layer - Our premium upgraded blue layer pre-filter helps reduce the quantity of large particles circulating in your air Compatible With for Humidifier Filters Replacement Filters - Compatible with HTF600 Filter & Filter T. Precision designed and manufactured for humidifier models HEV615 & HEV620