Perfect Compatibility: Specifically designed For Mi Air Purifier Ultra air purifiers, this replacement filter maintains optimal performance. It matches the original in both function and fit, ensuring your air purifier operates efficiently. Optimal Filter Life: To achieve the best air filtration and purification, replace the filter every 6-8 months. The lifespan based on your local air quality and how frequently the air purifier is used. Advanced 3-Stage Filtration: This filter features a multi-layer system including a Fine Nylon Preliminary Filter, 13 Grade HEPA Filter, and an Activated Carbon Filter. It effectively traps and reduces pollutants, providing cleaner air. High-Efficiency Performance: Captures up to 99.97% of fine particles and as small as 0.3 microns. It also absorbs odors from pets, smoking, and cooking with its activated carbon layer, enhancing your living environment. Reliable After-Sales Service: Each filter undergoes rigorous quality inspection to high performance. We are committed to customer satisfaction and are to assist with any product-related issues. Compatible Models: Ultra Ultra Enhanced Edition AC-M19-SC AC-M26-SC Color: Black Material: Composite Package Contents: 1*Air Purifier Filters 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.