PM 2.5 Activated Carbon Filter Retround Insert Replaceable Anti Haze Filter 5 Layers-30 Pcs

2.5 Activated Carbon Filter, Retround Insert Replaceable Anti Haze Filter 5 Layers 30 Pcs Tips:The frequency of change depends on how long you use it every day. If you use for a long time in a day, we suggest changing it once a day for better results. If you use it occasionally and for a short time in a day, you can change it once every 3 days or once a week. 1. First layer of spunbond cloth filters micron-level dust; 2. Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens. 3. Third layer of activated carbon cloth filters micron-level dust; 4. Fourth layer offers filter density for smaller material. 5. Fifth layer of spunbond cloth filters out all kinds of harmful substances. What’s in the package: 2.5 Activated Carbon Filter x 30 pcs Filter Size:12 * 8 cm/4.72 * 3.15 inches.