characteristic: Filters the precision to be possible from 5-200um for the customer choice, this product has anti-corrosive, bears broken high, the service life is long, filters the precision for superiority and so on absolute value, in the normal service condition, this product lifelong may clean, exempts the replacement. Adapt ion temperature: -25-55. Use profession: The petroleum, the oil field, the refinery, the medicine, refuel the equipment, the pipeline filters, the railroad, astronautics, the project machinery and so on.