[COMPATIBLE MODELS] The 115115 Size 21 replacement True HEPA filter is compatible with Winix air cleaner models C535, 5300, 5300-2, 6300, 6300-2, P300, AM90, 9000, 5000, and 5000B. Designed as a replacement for Part # 115115 Size 21 Filter A. [TRUE HEPA FILTERS] True HEPA high-efficiency filtration captures 99.97% of particles as small as 0.3 microns, helping maintain optimal air purifier performance. [EASY TO USE & REPLACE] This pack includes 4 True HEPA filters only, without carbon pre-filters. Filter size: 16.3 x 12.5 x 1.18 inches. Easy to install and replace—no tools required. Simply remove and replace the filter as needed. [HIGH PERFORMANCE] Made from high-quality composite material, this HEPA replacement filter offers efficient filtration with low airflow resistance for improved performance. Color: White Material: Composite material Package Contents: 4 x 115115 HEPA Replacement Filter Note: The package includes only the items listed above. Light reflection and display settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1-3 cm.