colorfullife 4 pack humidifier wicking filters for honeywell humidifier replacement filters hac-504aw, hac504v1,hac-504 filter a colorfullife compatible with hcm-300 series: hcm-300t, hcm-305t, hcm-310t, hcm-315t, hcm-350, hcm-350b, hcm-350w, hcm-450bcst, hcm-500 series: 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, hcm-700 series: hcm-710, hcm-1000 series: hcm-1000, hcm-1000c, hcm-1010, hcm-2000 series: hcm-2000c, hcm-2001, hcm-2002, hcm-2020, hcm-2050, hcm-2051, hcm2052, hev-312, hev-355.<br> compare to part # hac-504, hac-504aw, hac504v1.<br> package include 4pcs filters.<br>