3M  P100 Filter featuring exceptional 99.97% filter efficiency renders lightweight, Easy breathing comfort and versatile protection against many oil/non-oil based particulate contaminants. Filter measuring 4.3" X 4.3" is used in a variety of applications namely welding, brazing, torch cutting, metal pouring, soldering and exposure to lead, asbestos, cadmium, arsenic and MDA for concentrations up to 10 times the permissible exposure limit with half Facepieces or 50 times PEL with full Facepieces. This filter is designed to suit 5000, 6000 and 7000 series air purifying respirator.