What you get: Four carbon sponge prefilters in one package—enough for regular replacements to keep your air purifier working at peak performance. Purpose and benefit: These carbon sponge filters trap and absorb common household odors so your indoor air smells cleaner and fresher. Installing a fresh prefilter also helps your air purifier maintain airflow and overall effectiveness. Key features: Material: Activated carbon sponge designed for odor adsorption and trapping particulate debris at the prefilter stage. Size and fit: Standard size and easytouse design for quick, tool replacement. (Intended as a directswap prefilter.) Performance: Neutralizes kitchen odors, pet smells, smoke and other everyday household scents without altering purifier settings. Packaging: Set of four makes scheduled replacement simple and costeffective. Easy maintenance: the prefilter in seconds—remove the old carbon sponge filter and snap or slide in the one. Regular swaps keep the main filter cleaner and extend the unit's reliable operation. Practical applications: Kitchen or dining area: Reduce lingering cooking and frying odors after meal preparation. Homes with pets: Capture and neutralize petrelated smells in living rooms, bedrooms, or near litter areas. Small apartments and shared spaces: Keep the air feeling fresher in entryways, bathrooms, or smokeprone areas. Why customers need this: Regularly replacing the carbon prefilter prevents odor buildup, preserves purifier performance, and ensures a consistently fresher indoor environment without complicated maintenance. Compatible with air purifiers that use a standard carbon sponge prefilter design. regularly according to your purifier's maintenance schedule for results.