- Compatible Models: The A1 filter replacement is designed to fit VEWIOR home filters and AMEIFU AP01W, as well as models HQSC-50, HQKJ-80, and KOIOS HQKJ-50. Dimensions are 5.24" x 5.24" x 4.64". Confirm compatibility with your device before purchase. - High-Quality HEPA Filter: Constructed from premium materials, the A1 HEPA filter effectively captures small particles while maintaining optimal airflow for your air purifier. - 3-in-1 Filtration System: The HQKJ-80 features activated carbon particles that neutralize odors, including pet and smoke smells. The pre-filter captures larger debris, while the high-efficiency HEPA filter ensures the air you breathe is clean and fresh. - User-Friendly Design: The 3-in-1 configuration simplifies the replacement process. To maintain the effectiveness of your HEPA air purifier (HQKJ-50), we recommend changing the filter every 3-6 months or when the indicator light signals a replacement is needed. - Practical Applications: Ideal for households with pets to combat odors, for smokers to reduce lingering smells, or simply for anyone wanting to enhance indoor air quality. Perfect for allergy sufferers by filtering out dust, pollen, and other allergens. Ensure your air purifier runs at peak performance with the A1 filter replacement, providing a cleaner, healthier living environment.