Nispira 2-in-1 true hepa filter replacement with activated carbon pre filter compatible with blueair sense+ / sense air purifier compared to the original particle filter and activated carbon pre filter hepa filter removes up to 99.97 percent of airborne particles size as small as 0.3 microns. activated carbon filter removes smoke, odors from pets, cooking smells and vocs chemical. give you a peace of mind for fresh air. 4 hepa filters and 4 activated carbon pre filters will be included. suggest replacing the filter after 6 - 8 months use to optimize the performance. dimension: 17.5" x 5.5" x 2.3". this product meets or exceeds leading national brandcs' quality
