Cartridge, NIOSH Rating Ammonia (AM), Chlorine (CL), Formaldehyde (FM), Hydrogen Chloride (HC), Methylamine (MA), Sulfur Dioxide (SD), Olive, Compatible with Brand and Series Sundstrom SR 510, Respirator Cartridge Type PAPR, Respirator Connection Type Threaded, Package Quantity 2. This item has been restricted from sale in the following state (s): []