Humidifier Replacement Filter B, For HCM-750, Sku 152-007 Air Washing Layer Helps Capture Dirt, Dust & Pollen, Filter Helps Remove Minerals & Pollutants From The Water, Antimicrobially Treated Helps Prevent The Growth & Migration Of Mold, Algae & Bacteria On The Filter, HCM-750 Requires 2 Filters To Operate Properly, Filter HAC700PDQV1, TV #152-005.