<b>Filter Design Fit For:</b> <br>HCM-300 Series: HCM-300T, HCM-305T, HCM-310T, HCM-315T, HCM-350, HCM-350B, HCM-350W, HCM-450BCST, <br>HCM-500 Series: HCM-530, HCM-535, HCM-535-20, HCM-540, HCM-550, HCM-550-19, HCM-551, HCM-560. <br>HCM-600 Series: HCM-630, HCM-631, HCM-632, HCM-632TG, HCM-635, HCM-640BW, HCM-645, HCM-646, HCM-650, <br>HCM-700 Series: HCM-710. <br>HCM-1000 Series: HCM-1000, HCM-1000C, HCM-1010. <br>HCM-2000 Series: HCM-2000C, HCM-2001, HCM-2002, HCM-2020, HCM-2050, HCM-2051, HCM2052, HEV-312, HEV-355. <br><br><b>Package Include :</b>6-Pack HAC-504 Humidifier Compatible Filter. <br><br><b>Money Back Guarantee：</b> 30 days full money back Guarantee,Low price and high quality,Pls contact us first when you get some problem, we will offer you assistance asap.