3M™ Combination Filter CF22 A2B2E1P3 R D DT-4036E Suitable for use with certain 3M™ half and full-face tight-fitting respirators in negative-pressure mode, as well as 3M™ Powered Air Respirator System PF-600 Series Protects against particulates, organic and inorganic gases, and vapours. Protects against gases and vapours with a boiling point above 65?C Protects against inorganic gases and vapours, and acid gases and vapours Protects against a range of particulates: Solid and liquid particles Toxic and radioactive particles Micro-organisms (e.g., bacteria and viruses)Enzymes A2 classification when used in negative pressure mode A1 classification when used with approved powered air systems EN 14387:2004:2008