... effective against particulate aerosols free of oils. Particulate Respirator Features: 1) Disposable2) Filtration 95% effective against particulate aerosols free ... carbonate,china clay, cement, cellulose, sulfur, cotton, flour, carbon, ferrousmetals, hard wood, coal, iron ore, aluminum, free ... OV pre-filter: loaded with high performance active carbonpre-filter against nuisance organic vapor below PEL ...