For Honeywell-Humidifier Filters For HAC 504 And For Honeywell-Filter Compatible For HEV355C HCM-710 Series _x000D_ _x000D_ [COMPATIBLE MODELS] - Our HAC-504 humidifier filters fit for honeywell HCM-350, HCM350,HCM350W, HCM-350B, HCM350B, HCM-350W, HCM-350B-CST, HCM-300, HCM-300T, HCM300T, HCM-305T, HCM310T, HCM-315T, HCM305BCST, HCM-450B-CST, HCM450BCST, HCM-500, HCM-530, HCM530, HCM-535, HCM353, HCM-535-20, HCM53520, HCM-540, HCM550, HCM-550-19, HCM55019, HCM-551, HCM-560, HCM560, HCM-600, HCM-630, HCM630, HCM-631, HCM631 _x000D_ [THICK ABSORBENT CRAFT] - Our Upgrade humidifier filters for honeywell HAC-504 use strong and thick absorbent paper. The interlaced mesh structure allows water to pass through the voids to create capillarity. Therefore, our filter can reduce water evaporation to a greater extent and realize the high-efficiency water output of the humidifier. In addition, it can also improve the degree of hardening of the HAC-504 filter after exposure to moisture, thereby increasing the service life of the filter _x000D_ [EXCELLENT PERFORMENCE] - Our for honeywell hac-504 filter successfully filters impurities in the water and retain the mineral elements needed by the human body. While humidifying the air, it relieves the discomfort caused by the dry environment and moisturizes the skin. Prevents white a powder from entering the room air and depositing on everything in sight _x000D_ [GREAT VALUE] - Package includes 4 x Upgrade HAC-504 for honeywell humidifier filter. Our upgraded filters feature a blue pre-filter to catch large particles. Warm Tips: For best results, please fill the humidifier tank with distilled water. Excessive use of hard water will degrade filters and cause them to turn yellow prematurely. We recommend you to replace the HAC-504 filter every 2-3 months for optimal performance (depending upon your usage) _x000D_ _x000D_ Colour:Blue & White _x000D_ Material:wood pulp paper _x000D_ Size:About:20x13.4x2.2cm _x000D_ _x000D_ Package Contents: _x000D_ 4 * filter cartridge _x000D_ _x000D_ Only the above package content, other products are not included. _x000D_ Note: Light reflection 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_