Premium 4 stages filter compatible with Smart True HEPA Air Purifier 2.0 HSP002. Polypropylene blue filter captures smaller particles to improve HEPA filter efficiency. HEPA filter captures 99.97% of airborne particles size down to 0.3 microns. Cold catalyst in green removes harmful toxic household chemicals (formaldehyde, ammonia, benzene, and hydrogen sulfide). Activated carbon in honeycomb deodorizes household unfavorable odors & VOCs.
Dimension: 19" x 14.6" x 2.7. Suggest replacing the filter every 4 months the most to optimize the performance. This is not an OEM brand filter. But quality meets or exceeds the leading brand.