Check the listing for details. 3M 5N11 Replacement Pre Filter Case 100 Ea = 50 Pairs. Condition: New. Listed at 181.00 USD. 3M 5N11 Replacement Filter 100 Each = 50 PairsThe 3M 5N11 Prefilter is a filter for use with a 501 filter retainer. Filters are for use with toxic dusts or mists containing no oil. They are most often used as a prefilter for non-oil based paints or pesticides.Applications: Construction, Design & Construction, Facility Sanitation, Food Processing, Food Safety, General Manufacturing, Heavy Industrial, Industrial Maintenance, Marine, Metal Production & Fabrication, Mining, Oil & Gas, Pharmaceutical, TransportationKey Features:NIOSH approved for environments containing certain non-oil-based particlesUse on top of 3M gas and vapor cartridges with 3M 501 Retainer when particles are also presentUse on top of 3M 603 Filter Holder and 3M\501 Retainer to reduce particulate exposureReplaceable particle filter for cost savingsWide range of applications reduces inventory needs and training requirementsProtects Against:Solids such as those from processing minerals, coal, iron ore, cotton, flour, and certain other substances;Liquids or oil based particles from sprays that do not emit harmful vapors;Metal fumes produced from welding, brazing, cutting, and other operations involving heating of metals.Approved for environments containing certain non-oil based particles. Use with 3M™ Respirators 5000 Series or 3M™ Cartridges 6000 Series, and 3M™ Filter Retainer 501.When properly fitted, use with appropriate cartridges for various applications including spray painting, petrochemical and chemical manufacturing, and pesticide spraying for concentrations up to 10 times the Permissible Exposure Limit (PEL) with half facepieces or 50 times PEL with full facepieces. Full facepieces must be quantitatively fit tested to claim assigned protection factor above 10 in negative pressure mode. Do not use for aerosols containing oil or in environments that are immediately dangerous to life or health (IDLH).