1.COST EFFECTIVE AIR FILTER: The A2001 White HEPA air filter is made from the finest environmentally friendly and y materials and features the latest 3-layer filtration system: pre-filter, HEPA filter and activated carbon filter. This combination effectively captures 99.97% of particles as small as 0.3 microns, including pet dander, pollen, smoke, odors, dust and hair. The materials at the most affordable price, so you can enjoy clean air to the fullest 2.PERFECT FOR A2001: A2001 air purifier filter replacement works fully compatible with Airromi A2001 Air Purifier. Our A2001 air filters are provided to customers after several rigorous tests, compared to Part #AF-2001. Please confirm your machine's brand and model before purchasing 3.WIDELY USED: 3-in-1 filter replacements feature a combination of effective particles that quickly adsorb automobile exhaust, haze and pollutants from any other area. After a period of time, you will realize the powerful adsorption function of this filter, your nose will not be sensitive anymore, and your respiratory tract will be smoother and more comfortable. A2001 air purifier filter replacement is suitable for kitchen, living room, bedroom and for most people such as babies, pollen allergy, elderly and so on 4.EASY TO REPLACE: The A2001 true HEPA H13 filter is easy to install and replace. Package includes 2 x A2001 Replacement Filter. Size: 6.5 x 6.3 x 4.3 inches. Our A2001 replacement filter contains all the required parts to complete the standard installation of your air purifier filter A2001. To ensure the of you and your family, we recommend replacing the filter cartridge every 2-6 months