Value Pack - Premium replacement for HFT600 Filter T for your HEV615 & HEV620 humidifiers. Made from high-, durable material with an upgraded filter design to both filter particles and maximize moisture output Upgraded Blue -Filter Layer - premium upgraded blue layer -filter helps reduce the of particles circulating in your air Compatible With for Humidifier Replacement - Compatible with HTF600 Filter & Filter T. Precision designed and manufactured for humidifier models HEV615 & HEV620 Tips For Daily Use - For results, flip your compatible for humidifier T filter daily and only fill humidifier tank with distilled water (this applies to all of ). Hard water degrades ALL compatible for humidifier and yellows prematurely Installation Instructions - your replacement wick for T Filter for humidifier HEV615 and HEV620 in cool water replacing to uninterrupted moisture output. Place in filter housing with blue layer facing outwards (towards you) Material:wood pulp paper colour:Blue Package Contents: 4 * filter Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.