: This F100 filter replacement is designed specifically for AC4221 AC4228 air purifiers to seamless fit and functionality, preserving the integrity and efficiency of your air purifier. Advanced Air Purification Technology: This filter provides a comprehensive solution to indoor air pollution. High Efficiency Particle Air Filtration: Capable of capturing 99.97% of airborne particles including smoke, dust, pollen, pet dander and other pollutants, our advanced filtration technology ensures a cleaner, healthier environment in your home or office. Makes the filter odors: Our filters not only capture odors, but also neutralize them, providing a fresher, more comfortable indoor environment, perfect for homes with pets or smokers. Color: As Shown Material: plastic Package Contents: 1 x Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.