1.HIGH COMPATIBILITY : 115115 filter replacement fit for models C535, 115115, 5000, 5000B, 5300, 5300-2, 6300, 6300-2, C909, P300, 9000, WAC5300, WAC5500, WAC6300, AM90 2.GET IN THE FRESH AIR:115115 filter replacement for air purifier has a multi-layered purification defense, using advanced technology to captures virtually all hair, household dust, pet dander and other dirts down to 0.3 microns, and removes odors from pets, smoking, cooking and more. Let you and your family live in a fresh air environment, increase the comfort of life 3.TRUE HEPA FILTER :L air purifier filter replacement are made of high-strength HEPA material to ensure performance, have a significantly higher standard structure than many other sub-par filters, balancing the effectiveness of filtration and meanwhile ensuring enough air flow through circulation 4.VALUABLE PACKAGE : Package includes 2 pcs 115115 hepa replacement filter A and 8 pcs activated carbon filters. Dimension: H 16.3' x L 12.6' x W 1.2'. You can get quality comparable to the original at a favorable price by purchasing C535 replacement filters. Tips: It is recommand to replace the h13 true high efficiency filters every 6-12 months and the pre-filters every 3 months, which could help you protect air purifier better