3M Cartridge is used to give protection against oil and non-oil based particulate contaminants, hydrogen fluoride and nuisance levels of acid gases. This cartridge is compatible with 5000, 6000 and 7000 series air purifying respirator with nuisance level acid gas relief. It is used in a variety of applications namely aluminum processing for concentrations up to 10 times and 50 times the permissible exposure limit with half Facepieces and full Facepieces respectively. Cartridge made of unique flexible material makes it to be worn in close quarters and its rugged design resists abrasion and wetting. This cartridge with 95% of filter efficiency is lighter and easier to breathe through than cartridgefilter combinations.