... Efficiently removing unpleasant odor, dust, general air and water pollutants, and for killing bacteria. Features:* Efficiently removing ... unpleasant odor, dust, general air and water pollutants, and for killing bacteria.* Widely used in manufacturing ... vacuum, electric fan etc.*OEM customized in shape, dimension and density*20ppi,30ppi,35ppi,45ppi,60ppi,90ppi Hot!!!Water Air ...