The Winix Ultimate Small 4-Stage Replacement Filter Cartridge, suitable for the Winix PlasmaWave™ Air Cleaner models 9000S and 5000S, includes an anti-bacterial pre-filter, True HEPA filter, nano-silver mesh shield and washable activated carbon filter all in one convenient cartridge for easy replacement.

Fits Winix air cleaner models 9000S and 5000S.