The high efficiency HP202 HEPA air filters capture 99.97% of airborne particles and particles as small as 0.1 microns. The activated carbon prefilter absorbs smoke, cooking fumes and noxious odors from harmful volatile organic compounds. For the best performance, it is recommended to replace the HEPA filter every 6-8 months for the best performance (depending on your usage and environment), and obtain higher filtration performance for long-term use. HEPA Filter is made of environmentally friendly non-woven fabric and activated carbon, both of which use advanced low-energy, low-density structural technology by the manufacturer to provide low wind resistance, higher efficiency, and lower pressure to maximum filtration effect. The upgraded electrostatic electret filtration technology used in the nonwoven fabric saves energy and extends service life. Colour:Photo Color Material:Plastic + activated carbon Package Contents: 1 x HP202 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.