PM 2.5 Activated Carbon Filter Insert, Replaceable Anti Haze Filter Paper

Package: 20-Piece, Filter Size:12 * 8 cm/4.72 * 3.15 inches.Five layers Filter Material: 2*Anti-sticking cloth, 1 *Filter cloth, 1 * Activated Carbon and 1 * Efficient filter cloth as in pictureFirst layer of spunbond cloth filters micron-level dust; Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens.Third layer of activated carbon cloth filters micron-level dust; Fourth layer offers filter density for smaller material. Fifth layer of spunbond cloth filters out all kinds of harmful substances.Note: 1. Filter insert can not be cleaned and should be replaced every 2-3 days. 2. When film or sticky sediment stains emerge, please replace the filter.