Thank you for viewing! The following is quoted from the sales site: Honda Step WGN RK5/RK6 Air Conditioner Filter RK1 RG/RC/RB/RN Stream Odyssey CR-V etc. Special 5-layer structure, activated carbon PM2.5 removal, exhaust gas antibacterial DCC3006 Compatible part number 80292-SNL-T01 1 piece [5-layer structure filter] By adopting a 5-layer structure filter material, it catches pollen, dust, etc. from outside the car with the filter. Green layer: antibacterial, anti-mold, anti-virus. Central activated carbon layer: deodorization. White layer: High-dust removal filter that also blocks PM2.5 particles. Stable air volume performance improves air conditioner efficiency with a clean airflow! [Activated carbon cabin air filter] By utilizing the high adsorption efficiency that is a characteristic of activated carbon, it can remove gases that are the source of odors. Activated carbon air conditioner filters can be expected to have high deodorizing power, and can maintain a comfortable in-car environment with a once-a-year replacement. [Car air conditioner filter] The air conditioner filter used in automobiles is a CABIN (indoor) FILTER, which filters the air from the outside. Without a filter, the outside air will enter as is. Air conditioner filters block dirty fine particles such as dust, pollen, and exhaust gas in the atmosphere, purify the air, and then flow it into the air conditioner. *This item is a beautiful/new unused item. Although we have confirmed it, there may be inconspicuous fine deterioration even if it is a new unused item due to home storage. Also, because it is a product that uses activated carbon, black particles can be seen scattered inside the bag, but this does not affect the use. Thank you for your understanding. If there is a problem, please contact us via the transaction message before the receipt evaluation. ☆ Immediate purchase is welcome ☆ We plan to ship via Mercari ☆ Please note that the time to check/reply to comments varies depending on the day.