Climax Abek2p3 Filter. The filter offers protection against organic gases and vapours with a boiling point > 65 degree C. Inorganic gases and vapours, Sulphur Dioxide and other acidic gases and vapours as well as against ammonia and organic ammonia derivatives. ABEK2P3 Filters for Climax Respirators. EN 14387:2004+A1:2008.