3M 6000 Series Gas/Vapour Respirator CartridgesAvailable in Organic Vapours, Acid Gas, and Organic Vapour/Acid Gas Cartridges.6000 Series Combination Gas/Vapour/P100 Filter Respirator CartridgesAvailable in Organic Vapours, Acid Gas, and Organic Vapour/Acid Gas, Ammonia/Methylamine, Formaldehyde, Mercury Vapour, and Multi-Gas Vapour Cartridges.Sold by the pair