The filtration series products are effective filtering media for dust, smoke, and bacteria, etc. pollutants. Depending on the filtering effect, they can be divided into primary filter nets, medium efficiency filter nets, sub-high efficiency filter nets, and high efficiency filter nets. They can be widely used in air purifiers, air conditioners, fresh air systems, etc., and the high efficiency filter nets can also be used in the air supply of clean purification workshops and clean rooms at the end; Primary filter net: filters hair, cotton fluff fibers, and some large particle dust; Medium efficiency filter net: filters fine particles pollutants with a diameter of 0.5um and above; Sub-high efficiency filter net: effectively filters fine particles pollutants with a diameter of 0.5um and above; High efficiency filter net: effectively filters fine particles pollutants with a diameter of 0.3um and above, reaching 99.97%. Complete range of filter nets–can be matched according to different whole machine requirements; High filtering efficiency–can effectively remove fine particles pollutants of 0.3um and above, reaching 99.97%, product structure–can be customized according to requirements. Specifications: Technical parameters: Resistance: ≤35Pa (test wind speed: 5.33cm/s) Efficiency: Fine particles pollutants of 0.3um and above, reaching 99.97%.