1. Compatible models: Suitable for FY2423/40 air purifiers, providing replacement filter sets for models 2000 and 2000I. 2. True High-Efficiency Particulate Air (HEPA) filter: Capable of capturing particles as small as 0.3 microns passing through the filter. 3. Health beneficial: The true HEPA filter and activated carbon filter set can also remove ultrafine particles as small as 20 nanometers (i.e., 0.02 microns, 2500 times smaller than [the comparison object is missing in the original text]) from the air passing through the filter. 4. Activated carbon filter: It has a super-strong honeycomb structure, which can effectively reduce gases and odors in the air passing through the filter, making it very suitable for people who want to improve air quality. 5. Well-sealed: The filter is sealed to ensure its service life. It is recommended to replace the air filter every 6 months. Take the filter out of the plastic packaging and then put it into the air purifier. 6. Color: Black 7. Material: Plastic 8. Dimensions: 36 x 4.5 x 27.5 cm 9. Package contents: - 1 HEPA filter - 1 activated carbon filter Only the above items are included in the package, and no other products are included. 10. Precautions: Light and different displays may cause slight differences between the color of the items in the picture and the actual product. The allowable measurement error is ±1 - 3 cm.