3M 2000 series particulate filters for 3M half and full face masks, against solid and liquid particles up to P2 and P3. Carbon versions also protect against nuisance organic vapours and acid gases below the limit and ozone up to 10× the limit. Types: 2125 – P2R; 2128 – P2R with carbon; 2135 – P3R; 2138 – P3R with carbon. Attach to gas filters with the 3M 502 adapter.