ABEK1 Filter provides protection against inorganic vapours with a boiling point higher that 65°. Suitable for use with the Sealey 9000 half face mask. Conforms toEN14387:2004+A1:2008. Protects against inorganic vapours and gases, sulphur dioxide, (SO2) ammonia (NH3), and derivatives at a concentration not exceeding 0.1% volume by air. Extended duration product.