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 prefilter or TR-662 spark arrestor in place. For maximum PAPR system run time, select the TR-632 High Capacity Battery when using this cartridge.