【Only Compatible with Core 200S】Our Core 200S replacement filter is only compatible with LEVOIT Core 200S air purifier. Replacement part number: Core 200S-RF. Please check your model before placing an order. 【3-Stage Filtration Design】Our Core 200S replacement filter consists of a True H13 HEPA filter, high-efficiency activated carbon, and a fine nylon pre-filter, which work together to reduce airborne particles and unwanted odors in your living space, providing better air quality. air, ideal for pet owners, smokers and people living in the city. 【Value Pack】The pack includes 2 high-efficiency Core 200S-RF replacement filters. Our Core 200S filters are easy to install without tools. Our Core 200S filter has the same quality and function as the original. 【Replace Regularly】To keep your Core 200S operating at high performance, it is recommended to replace the Core 200S RF filter every 6 to 8 months, also depending on your frequency of use.