Best Seller | Guardian Technologies PureGuardian Demineralization Humidifier Cartridge in White | 3.1 H x 2.5 W x 2.5 D in | Wayfair FLTDC20 The PureGuardian Demineralization Cartridge can be inserted into the following models: H1200, H1200BL, H1210, H1250, H1300, H3200, H3250, H7500, H7550, H7560B, H1175 and H5225, H5175W to help prevent the release of minerals into the air that can cause... ... more Guardian Technologies PureGuardian Demineralization Humidifier Cartridge in White | 3.1 H x 2.5 W x 2.5 D in | Wayfair FLTDC20 The PureGuardian Demineralization Cartridge can be inserted into the following models: H1200, H1200BL, H1210, H1250, H1300, H3200, H3250, H7500, H7550, H7560B, H1175 and H5225, H5175W to help prevent the release of minerals into the air that can cause... Wayfair | | $19.99 $16.38 go to store |