MOS Reference: NIOSH-approved organic vapor (OV) cartridges for protection against a wide range of organic solvent vapors including toluene, xylene, acetone, MEK, and paint fumes. Activated carbon adsorption media captures vapors at concentrations up to 10x the OSHA PEL. Bayonet-mount connection compatible with standard half-face and full-face respirators. Black color coding per NIOSH standards. Replace when odor or taste breakthrough is detected. Sold as a matched pair.