https://www.amazon.com/Winix-1151…B002QUZJ
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
Use to replace worn out filters, Helps remove allergens and other airborne particles while absorbing odors and VOCs
Fits Winix air cleaner models 5300-2, C535, P300, 6300-2, 5300, 5500, 9000, 5000,5000B
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