The TR 6530N is a combination cartridge for certain particulates, Organic Vapor/Acid Gas (OV/AG), 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 acid gases, such as in pharmaceutical manufacturing, mold remediation, . 3M recommends the use of the TR 6500FC filter cover to help protect the filter/cartridge from physcial 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 the this cartridge. NIOSH approval: OV/SD/HC/CL/HF/HE