... uniformity,and shape 2.Less air resistance 3.Easy to cut and fold Activated carbon filter paper is characterized by ... good uniformity, absorption speed, absorption capacity, cleaning ability, and good shape, pore size smaller, less air ... M2 Thickness(mm) 1.4-1.5mm Filtration Efficiency >=98% Air Permeability >1000L/ M2.SDust Collection 450g/ M2Tensile Strength >=260N ...