Compatibility: True HEPA filter replacement compatible with fillo Halo allo air purifier. 3-STAGE FILTRATION: Premium True HEPA pre-filter and filter remove 99.97% of airborne particles down to 0.3 micrometers in size. Activated carbon filter effectively eliminates household odors from pets, cooking, smoking, and . EASY TO INSTALL: The filter replacement is easy to replace and remove without any tools required. Ture HEPA Filter Replacement Replace it every 3-6 months depending on usage and environment. Dimensions: Ture HEPA Filter Replacement: Simply remove the old and dirty filter and replace the cover, just 1 minute. Size: 16.5 x 10 cm Material: plastic Color: as shown Package Contents: 2 x Filter Elements Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.