Gas filter with standard thread connector to EN 148-1 for organic vapours having boiling point higher than 65C, inorganic gases and vapours, Sulphur Dioxide (SO2), Ammonia (NH3) and its derivatives. Do not use in areas where the oxygen concentration is lower than 17% in volume nor in presence of gases different from those clearly indicated, dusts, fumes and mists. Store at temperatures between -20 and 50C and RH