Fette Filter - Humidifier Wicking Filters Compatible with Honeywell HAC-504AW, Filter A for Models HAC-504 (Pack of 4)<p>COMPATIBILITY -HCM-300, HCM-300T, HCM-305T, HCM-310T, HCM-315T, HCM-350, HCM-350B, HCM-350W, HCM-350B-CST, HCM450BCST, HCM-500, HCM-530, HCM-535, HCM-535-20, HCM-540, HCM-550, HCM-550-19, HCM-551, HCM-560, HCM-600, HCM-630, HCM-631, HCM-632, HCM-632TG, HCM-635, HCM-640BW, HCM-645, HCM-646, HCM-650, HCM-700, HCM-710, HCM-1000, HCM-1000C, HCM-1010, HCM-2000, HCM-2000C, HCM-2001, HCM-2002, HCM-2020, HCM-2050, HCM-2051, HCM2052, HEV-312, and HEV-355<p>Packing May Vary!!<p>This is NOT a Honeywell, Holmes or Sunbeam OEM product. The Honeywell, Holmes and Sunbeam brand names and logos are the registered trademarks of their respective owners. Any use of the Honeywell, Holmes and Sunbeam brand names or model designations for this product are made solely for purposes of demonstrating compatibility.