... filter material 1.Good uniformity,and shape 2.Less air resistance 3.High absorption 4.High efficiency Activated carbon filter ... , cleaning ability, and good shape, pore size smaller, less air resistance, thickness optional, easy to cut and fold according to ... M2 Thickness(mm) 1.0-1.1mm Filtration Efficiency ≥98%Air Permeability >1300L/ M2.SDust Collection 420g/ M2Tensile Strength >=260N/5CMHeat ...