Sundström SR299-2 Organic + Inorganic + Acid Gas + Ammonia + Mercury + Particles Filter ABEK1HgP3 (Each)Organic gas inorganic gas acid gas ammonia mercury particle filter class ABEK1HgP3 (regular capacity). Material: Plastic polypropylene. No metal parts. Usage: TYPE PROTECTION A Organic gases and vapours, such as solvents, with boiling points above +65C. B Inorganic gases and vapours, such as chlorine, hydrogen sulphide, hydrogen cyanide. E Acid gases and vapours, such as sulphur dioxide, hydrogen fluoride. K Ammonia and certain amines, such as