Replacement Cartridge Filters EO4207.02 Environmental. Replacement Element for Part Number Environmental EO4207.02 Filter. OC, Sq FT Media 80/20 Blended. Environmental is a registered trademark of the respective company. TDSF-10002197 Replacement Cartridge Filters EO4207.02 Environmental.Our Replacement filters Work As Good Or The Same As The OEM Filters. We guarantee their performance. Some of the filters are non stock items and cannot be returned. Please see our return policy.