Compatible Model: A1 filter replacement compatible with Vewior air purifier filter replacement for home and AMEIFU AP01W air purifier. Model HQSC-50, HQKJ-80, KOIOS HQKJ-50. Size:5.24 inch x 5.24 inch x 4.64 inch. You need to check your air purifier carefully to make sure it is the correct filter Premium Efficient Filter: A1 efficient replacement filter is made of premium material, which can efficiently filter most of small particles. While ensuring the filtration efficiency, it can guarantee the maximum airflow of the air purifier 3-In1 Filtration：HQKJ-80 activated carbon particles can effectively remove odor, pet odor, smoking and so on in the air. The pre-filter can capture large particles. Efficient filter provides guarantee for your clean air Easy To Use: 3-in-1 design makes replacement easier. To ensure the best performance of air cleaner, HQKJ-50, we recommend that you replace the filter every 3-6 months or when the indicator light comes on Purchase Without Worry: We focus on fresh air and health. We strictly control the selection of HQKJ-50 air urifier filter replacement materials and the manufacturing process. If you have any questions, please feel free to contact us A1 filter replacement