[Application] The filter accessories are only for PureZone Halo air purifier, to other models. Please confirm your machine model before purchase. [HEPA Filtration] Activated carbon pre-filter combined with H13 level HEPA filter 2-in-1 can isolate 99.97% of dust, pet hair, smoke, and household odors as small as 0.3 micrometers. [Warm Tip] Washing the filter may cause the transformation of the HEPA filter. It's recommended to wipe the surface with wet tissue, then reuse it after fully dry. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Plastic Package Contents: 2 * replacement filter 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.