Compatible with AIRCARE Essick Air 400, 500, 600, 696, 4000, 6000, 4D7, 4DTS, ED11 AIRCARE / Bemis / Essick Air Humidifiers:
426300, 426700, 427300, 436300, 447301, 447302, 447400, 447400HB, 447401, 496600, 496800, 497300, 497800, 4D6800, 4D7800, 4D7300, 4DTS300, 4DTS400, 4DTS900, 696100, 696400, 696400HB, 696800, 697400, 697500, 697500HB, ED11-600, ED11-800, ED11-910, 4161, 4261, 4262, 4263, 4266, 4267, 4273, 4362, 4363, 4371, 4473, 4474, 4962, 4963, 4966, 4968, 4971, 4973, 4978, 6964, 6974.
!!! PLEASE NOTE:
This wick filter fits humidifiers with TWO water bottles. Does NOT fit models that have only one bottle.