Key features

• •4 Piece Value Pack - 4 filters compatible with Honeywell replacement wicking Filter A for your Honeywell HAC-504, HAC-504AW, and HAC-504V1 humidifier filters. Made from high-quality, durable material with an optimized filter design to maximize your compatible Honeywell HCM 350 filter moisture output
• •Upgraded Blue Filters - Our upgraded filters compatible with Honeywell HCM350W filter feature a blue pre-filter to catch large particles before they enter your air, for even higher air quality
• •Rigid Construction To Reduce Sagging - Constructed with rigid absorbent paper to improve the filter's structure once wet and reduce sagging
• •Compatible With Honeywell Humidifier Filter Model HCM350W & More - Fits HCM350W, HCM-350, HCM350, HCM-350B, HCM350B, HCM-350W, HCM-350B-CST, HCM-300, HCM300, HCM-300T, HCM300T, HCM-305T, HCM305T, HCM-310T, HCM310T, HCM-315T, HCM315T, HCM305BCST, HCM-450B-CST, HCM450BCST, HCM-500, HCM500, HCM-530, HCM530, HCM-535, HCM353, HCM-535-20, HCM53520, HCM-540, HCM540, HCM-550, HCM550, HCM-550-19, HCM55019, HCM-551, HCM551, HCM-560, HCM560, HCM-600, HCM600, HCM-630, HCM630, HCM-631, HCM631
• •Usage Tips - For best results, flip your compatible Honeywell humidifier filter HAC 504 replacement daily and only fill humidifier tank with distilled water. Hard water degrades ALL compatible Honeywell humidifier filters and yellows them prematurely. Soak in cool water before replacing to ensure uninterrupted moisture output.