Combination Cartridge/Filter, NIOSH Rating Organic Vapor (OV), P100, Black, Magenta, Compatible with Brand and Series Honeywell North 5400 Series, Honeywell North 5500 Series, Honeywell North 7600 Series, Honeywell North 7700 Series, Honeywell North RU6500 Series, Honeywell North RU8500 Series, Respirator Cartridge Type Air Purifying Respirator, Respirator Connection Type Threaded, 1 Pair