<p><b>Perfect Replacement for Honeywell HAC-504, HAC-504AW & HAC-501V1 Filters</b></p> <p>Made from high-quality, durable material, these filters are compatible with the below Honeywell humidifier models:</p> <p><b>HCM-300 Series:</b> HCM-300T, HCM-305T, HCM-310T, HCM-315T, HCM-350, HCM-350B, & HCM-450BCST</p> <p><b>HCM-500 Series:</b> HCM-530, HCM-535, HCM-535-20, HCM-540, HCM-550, HCM-550-19, HCM-551, & HCM-560 HCM-600 Series: HCM-630, HCM-631, HCM-632, HCM-632TG, HCM-635, HCM-640BW, HCM-645, HCM-646, & HCM-650</p> <p><b>HCM-700 Series:</b> HCM-710</p> <p><b>HCM-1000 Series:</b> HCM-1000, HCM-1000C, & HCM-1010</p> <p><b>HCM-2000 Series:</b> HCM-2000C, HCM-2001, HCM-2002, HCM-2020, HCM-2050, HCM-2051, HCM2052, HEV-312, & HEV-355</p> <p><b>Enviracaire Series:</b> ECM-250i</p> <p><b>Package Contents</b><br> 4 humidifier filters compatible with Honeywell HAC-504AW and HAC-504V1</p> <p><b>Rest Assured with Frequent Filter’s Manufacturer Lifetime Guarantee</b><br> If you are ever unsatisfied with the performance of our humidifier filters, we offer a 100% money back guarantee.</p><p>Works great to replace in old Honey well Humidifiers for bedroom. It is also compatible with Protec HAC504v1. Will work with model HCM 350w and other vaporizer models. Our filter is optimized to increase moisture output .</p>