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The TR 6590N is a combination High Efficiency (HE) particulate/Multi Gas (MG) cartridge for use with TR 600 PAPR Systems. This filter/cartridge is suitable for certain particulates, mercury, certain organic vapors, chlorine dioxide, chlorine, hydrogen chloride, sulfur dioxide, ammonia, methylamine, and/or hydrogen fluoride. This filter/cartridge is NIOSH approved for use against the broadest range of airborne contaminants of any Versaflo cartridge. 3M™ recommends the use of the TR 6500FC filter cover to help protect the filter/cartridge from physical damage. The TR 6500FC filter cover is also used to hold the TR 6600 prefilter or TR 662 spark arrestor in place.