[COMPATIBILE MODELS]The 115115 Size 21replacement True HEPA filter is perfectly for Winix air cleaner models C535, 5300, 5300-2, 6300, 6300-2, P300, AM90, 9000, 5000, 5000B, Compared to Part # 115115 Size 21 Filter A. [TRUE HEPA FILTERS] for Winix c535 Replacement Filter with true HEPA high efficiency filtration works for attaching of 99.97% of particles down to 0.3 Micrometres in size, keeps your air purifier running efficiently. [EASY TO USE & REPLACE]Contains 4 Pack C535 True HEPA filters ONLY. No carbon pre-filters. for Winix 115115 Replacement HEPA Filter Size: 16.3inch x 12.5inch x 1.18inch. It is easy to replace and , no tools required. Simply remove and replace from your air purifier unit when needed. [HIGH PERFORMANCE]Our 115115 HEPA replacement filter for Winix C535 is made of high quality, with higher efficiency and less pressure to ensure maximum filtration.<br><br>Colour:White Material:composite material<br><br>Package Contents: 4 x 115115 HEPA Replacement Filter<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.