Enhanced Equipment Protection: This HEPA filter effectively blocks fine dust particles, preventing them from entering and damaging your air purifier. By reducing wear and tear, it significantly extends the lifespan of for your Air Purifier Core 400S, ensuring optimal performance and durability. Quiet & Energy-Saving Operation: Crafted from low-resistance materials, our air filter operates silently and consumes minimal energy. This design not only ensures a peaceful environment but also helps in reducing your electricity bills, making it both eco-friendly and economical. Optimal Ventilation System Performance: Keep your ventilation system free of debris and reduce wind resistance with our HEPA filter. This improvement in airflow efficiency enhances the overall performance of your air conditioning and fresh air systems, leading to noticeable energy savings. Extended Lifespan & Cost Efficiency: Our air filter's thoughtful structural design increases its dust holding capacity, which minimizes the need for frequent replacements. This feature helps in cutting down the long-term costs associated with maintaining air purity in your home or office. Compatibility Assurance: Specifically designed for Air Purifier Core 400S, our filter ensures a and optimal function. Replace your old filter with confidence, knowing that you are maintaining the high efficiency and quality of your indoor air purification system. Color: Yellow Material: Composite material Package Contents: 1 * Air Purifier 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.