This nylon primary filter has a thickness of 5mm, using PU rimmed technology. The outer layer is thin and strong, effectively saving space. It is mainly used for the ventilation system and can effectively block large particles such as hair and dander to ensure air quality. Its careful design not only provides good filtration performance but also provides a longer life and more stable operating environment for the equipment. The application of this filter makes the filtration process more efficient and creates fresh and clean air for the indoor environment.