The TR 6510N is a combination cartridge for certain particulates and organic vapors, for use with TR-600 Series powered air purifying respirators. This filter/cartridge may be suitable for operations where the primary hazard is particulate and/or certain organic vapors or gases, such as in pharmaceutical manufacturing or painting operations. 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 pre-filter or TR 662 spark arrestor in place. For maximum PAPR system run time, select the TR 632 high capacity battery when using the this cartridge. NIOSH OV/HE approved.