Honeywell Household Odor and Gas Reducing Pre-Filter, 2pk: * Helps capture certain harmful gases * Deodorizes the air, reducing odors with activated carbon and zeolite * Reduces odors more effectively than standard carbon filters * Traps larger particles such as dust, lint, fibers and pet fur * Replace every 3 months to maintains freshness * Package contains 1 filter * Fits most Honeywell Tower Air Purifier models