Activated carbon pre-filter replacement compatible with GermGuardian AC4800 Series Filter B Compatible with air purifier model AC4800 AC4825 AC4300 AC4800 AC4900CA activated carbon pre filter deodorizes many common household odors and chemical smells. Filter dimension 15.5x 4.8 x 0.4 inches. A set of 4 filters included. Suggest to replace every 3 months 100% customer satisfaction guaranteed. Quality meets or exceeds leading national brand. Disclaimer: Any brands, and trademarks or images featured or referred to within the Nispira.com are the property of their respective trademark holders. These trademark holders are not affiliated with Nispira or its website. These trademark holders do not sponsor or endorse Nispira or any of its products or comments. Further, Nispira declares no affiliation, sponsorship, nor any partnerships with any registered trademarks unless otherwise stated. Activated carbon pre-filter replacement compatible with GermGuardian AC4800 Series Filter B. Filter dimension 15.5 x 4.8 x 0.4 inches. A set of 4 filters included. Disclaimer: Any brands, and trademarks or images featured or referred to within the Nispira.com are the property of their respective trademark holders. These trademark holders are not affiliated with Nispira or its website. These trademark holders do not sponsor or endorse Nispira or any of its products or comments. Further, Nispira declares no affiliation, sponsorship, nor any partnerships with any registered trademarks unless otherwise stated.