The 3M Replacement P95 Particulate Filter helps provide respiratory protection against a wide range of oil and non-oil based particulate contaminants. Use with appropriate 3M 5000 Series Respirators or 6000 Series cartridges for various applications including spray painting， lacquering， petrochemical and chemical manufacturing and pesticide spraying and agriculture for concentrations up to 10 times the Permissible Exposure Limit (PEL) with half facepieces or 50 times PEL with quantitatively fit tested full facepieces. The filter protects against: 1) solids such as those from processing minerals， coal， iron ore， cotton， flour and certain other substances 2) liquids or oil based particles from sprays that do not emit harmful vapors 3) metal fumes produced from welding， brazing， cutting and other operations involving heating of metals. This filter has been rated P95， which means it filters at least 95% of airborne particles and is strongly resistant to oil. Breathing hazardous particles can pose a risk to your health. NIOSH， a Federal government regulatory agency， has tested and approved the 3M Particulate Filter 5P71 to help reduce exposure to certain particles.