1.[ ]Our replacement filter is compatible with VEWIOR A1 air purifi-er, HQSC-50, HQKJ-80, AMEIFU AP01W, KOIOS HQKJ-50, Tailulu PUR0003 air purifi-er. Purchase our hqsc-50 replacement filter to keep your hqsc-50 air purifi-er at its working efficiency and capacity, breathing fresher and cleaner air all the time. 2.[- ]Replacement for VEWIOR A1 filter is designed in H13 True HEPA Filter, high-efficiency activated carbon and fine Pre-Filter that work together to reduce airborne particles and unwanted odors in your living space for improved air quality, ideal for pet owners, smokers, and people who live in cities. 3.[ ]The valuable pack includes 2 high-efficiency Replacement for vewior hqsc-50 air purifi-er filter replacement. Our Replacement for vewior a1 replacement filter can be installed easily without any tools. Our A1 filter has the same quality and function as the original, we have tested it before for , so please don't worry about buying. 4.[ ]You may need to replace your hqsc-50 replacement filter earlier or later depending on how often you use your A1 air purifi-er. Using your hqsc-50 air purifi-er in an environment with relatively high pollution may mean you will need to replace the filter more often. To keep your AMEIFU AP01W air purifi-er running at high performance, it is recommended to replace the A1 filter every 3-6 months, also depending on your frequency of use.