Pack 2 fp abek1p3 filter with thread. fp screw-on filter for breath half-mask. abek1p3 filter (organic and inorganic gases and vapors, acid gases and ammonia class 1 and particles class 3). uses and use: industry (metal, foundries, organic and inorganic chemical industry, pharmaceutical, ..), agriculture (agrochemical products, phytosanitary , herbicides, fumigation), fishing (fish farm, processing), maintenance (disinfection, domestic and industrial cleaning, sodium hypochlorite), industrial maintenance, food maintenance, manufacturing (chemical, ships, cars, refrigeration equipment, appliances, hydrochloric acid , nitric sulfhydric, sulfuric).