... cleaning ability, and good shape, pore size smaller, less air resistance, thickness optional, easy to cut and fold according to ... M2 Thickness(mm) 1.4-1.5mm Filtration Efficiency >=98% Air Permeability >1000L/ M2.SDust Collection 450g/ M2Tensile Strength >=260N/5CMHeat ... Resistance >180°CMainly used for a variety of vehicle air conditioner, home air conditioning, air purification, etc.