Protection Replacement Cartridges are designed for use with 3M 6000 or 7500 Series half-facepiece respirators (sold separately) for professional removal of certain mold, lead & sprays from coatings & sealants. Cartridges are NIOSH approved & offer at least 99.7 percent efficiency against solid & liquid aerosols, including oils. Easy-to-use replacement cartridges are a great choice in respiratory protection for the professional. Cartridges & respirators are not recommended for Do-it-Yourself applications.