Restock or change up your filter game with the household filter B odor and gas reducing pre-filter. These pre-filters are great for capturing harmful gasses such as ammonia and other volatile organic compounds that can come up in your home. Pre-filters are also great well for deodorizing the air and reducing odors with their activated carbon and zeolite qualities. Absorbing common household gasses and fumes, these pre-filters will capture large pesky particles such as dirt, lint, fibers, and pet fur. Provide the best breathing experience for you and your family.