1. High-density HEPA, strong compression, controlled wind resistance, dense folds, dust holding capacity 2. Environmentally friendly materials, strong corrosion resistance, deodorization, and inhibition of bacteria 3. Acid-washed modified formula carbon, continuous adsorption and decomposition of formaldehyde/odor 4. Effectively filter PM2.5, secondhand smoke, dust, benzene, formaldehyde and other pollutants 5. It is recommended to replace it every 6-8 months, and the specific time depends on the machine prompts 6. Materials: primary gauze, composite HEPA filter paper, activated carbon layer 7. Size: about 28 x 19cm
