- Compatible Models: The A1 filter replacement is designed to fit VEWIOR replacement filters for home and AMEIFU AP01W. It is also compatible with models HQSC-50, HQKJ-80, and KOIOS HQKJ-50. Size: 5.24 in x 5.24 in x 4.64 in. Please verify your machine's specifications to ensure proper fit. - High Efficiency: Crafted from premium materials, the A1 replacement filter excels at capturing small particles, ensuring effective filtration without compromising airflow. - 3-in-1 Filtration System: The HQKJ-80 utilizes activated carbon particles to eliminate odors such as pet scents and smoke. The pre-filter captures larger debris, while the main filter guarantees a clean air environment. - User-Friendly Design: The 3-in-1 filter design simplifies installation and replacement. For optimal performance of the HEPA air cleaner (model HQKJ-50), it is recommended to change the filter every 3-6 months or when the indicator prompts. - Practical Applications: Ideal for households with pets to combat pet odors, for allergy sufferers seeking cleaner air, and perfect for environments with smoke, enhancing overall indoor air quality. Upgrade your air filtration with the A1 replacement filter for fresher, cleaner air throughout your home.