Regular replacement of AC Filter ensures sustained purification effectiveness; always disconnect your air conditioner's power and clean the intake area before installing the filter. High-density sponge Air Filter effectively blocks dust and debris from entering your AC system, helping to preserve the cleanliness of internal components. Black honeycomb structured Air Conditioner Filter an expanded adsorption area, maintains its shape without warping, and boasts a longer service life compared to standard filters. Air Conditioning Filter design fits most major air conditioner brands; simply cut to match your unit's intake area size for quick, tool-free installation. Multi-layer Air Conditioner Foam Filter traps airborne impurities and adsorbs harmful gaseous substances such as formaldehyde and benzene, enhancing the quality of air flowing from your air conditioner.