***** USE # Sun6521 only $ 29.99***** Three Resin Filter Socks to drop in the Water Tank, Almost 3 for the Price of 1, While Stock Lasts. Demineralization Cartridge Water Kit. Orginal FACTORY Filter Package # DMC221 is NO Longer Available from Bionaire, you can use Substitute from Sunbeam's UltraSonic Humidifer. WHILE STOCK LASTS, we have the LAST in CANADA. Fits models BT199, BT201, BT202, BT204. Related Items: The Pre-filter(BIODMF301) for models BT199, BT201, BT202, & BT204