GENUINE GERMGUARDIAN CARBON REPLACEMENT FILTERS: Contains 4 carbon replacement filters for use with GermGuardian Filter FLT4700 HEPA filter for AC4700B Air Purifier. CERTIFIED EXTRA: 4-Pack carbon replacement filters are designed to effectively tackle unwanted odors, harmful pollutants, and capture large fibers and particles. With our 4-pack, you'll experience long-lasting freshness and unparalleled purification for months to come. REDUCES ODORS: The activated carbon pre-filters contain powerful odor-reducing properties and can reduce unwanted odors from wildfire smoke, cooking aromas, pet odors, musty air, paint and more. REDUCES HARMFUL VOCs: In addition to mitigating odors, the activated carbon filters help reduce VOCs (volatile organic compounds) present in the air, commonly emitted by household cleaning products, furniture, and building materials. REFRESH TO IMPRESS: The activated carbon filters capture large fibers and particles, such as pet hair, dust and dander. Spend less time cleaning and more time entertaining by replacing your carbon filter every 2-3 months. WHY BUY CARBON 4 PACKS: All GermGuardian filters come with a HEPA Filter and carbon layer. By regularly replacing the carbon layer, your air purifier will continue to deliver the highest standard of air quality day in and day out. For optimal performance, we recommend replacing the activated carbon filter layer every 2-3 months depending on your indoor environment. This ensures that you maximize the effectiveness of your HEPA Air Purifier and enjoy clean air day after day. PURER PARTS, PURER AIR: Genuine Germ Guardian replacement filters offer certified fit and maximum filtration. Off-brand filters often fail HEPA testing standards, fit incorrectly, reduce efficacy, and may cause damage to the air purifier. COMPATIBLE WITH: Germ Guardian Air Purifier Model AC4700B and AC4711W