50PCS PM2.5 Activated Carbon Filter 5 Layers Replaceable Anti Haze Filter Paper for Adult

Feature: ?1) Due to different manual measurement methods, please allow a slight difference in size. ?2) Due to monitor reflections, the color may differ slightly from the actual project compared to the image. ?3) If you have any questions, please leave us a message and we will keep in touch with you. PM 2.5 activated carbon filter, reversible insertable replaceable anti-fog filter 5 layers Tip: The frequency of changes depends on how long you use each day. If you use it for a long time a day, it is recommended that you change it once a day to maintain health. If you use it occasionally, you can change it every 3 days or once a week. 1. The first layer of spunbond cloth filters out micron-level dust; 2. The second layer filters industrial pollutants, automobile exhaust, second-hand smoke and pollen allergens. 3. The third layer of activated carbon cloth filters out micron-level dust; 4. The fourth layer provides filter density for smaller materials. 5. The fifth layer of spunbond cloth filters out various harmful substances. Package Contents: PM 2.5 activated carbon filter x 50 Filter size: 12.5 * 8cm / 4.72 * 3.15 inches.