Compatible with Winix air cleaner models C535, 5300-2, P300, 5300 | Use to replace worn out filters, Helps remove allergens and other airborne particles while absorbing odors and VOCs | The Winix True HEPA + 4 Filter Activated Carbon Replacement Filter includes a True HEPA filter and 4 carbon pre-filters, helping to rid the air of dust, allergens and other particles | Includes 4 carbon pre-filters for year-round use, Recommended replacement schedule of carbon pre-filter is once every 3 months | The true HEPA filter captures 99.97% of particles and impurities as small as 0.3 microns