AfterMarket Fellowes CF-230 Carbon Filter 4-Pack for the Fellowes AP-230PH Air Purifier (9372001) By Breathe Naturally 4-Pack Replacement Carbon Filter for Fellowes AP-230PH (9372001) Carbon filter removes odors and captures large airborne particulates. Filters Made of Activated Carbon Made in the USA Premium Carbon Pre-Filters BulkFilterTM Brand material