The high-performance MSA filters provide strong protection against a wide range of toxic gases and particles  in full accordance with the latest standards. MSA’s PlexTec particle filter technology increases filtering surface for easier breathing. Benefits for the user include: safe selection, no mix-ups, economical procurement, simpler stock keeping.Available in gas filter classes 1 or 2, and particles classes 2 and 3, in single or multiple gas rangeThey are using the standard threaded connection EN148-1 and are compatible with all available facepieces equiped with the same thread.The 92 and 93 series of MSA gas filters are in full compliance with the REACH regulation and do not include any toxic materials listed in the European Regulation. 93 K/ST, Combined Filter, K2-P3 R D (EN 14387)