The North N99 Particulate Filters are NIOSH approved for protection against solid and liquid particles - not including those that contain oil.
N99 respirators filters are NIOSH certified to have filter efficiency level of 99.1% or greater against non-oil based particulates.
The North N99 respirator filter can be used with any North respirator facepieces and must be also be used in addition to a North respirator cartridge. These filters also require the use of the North Filter Cover.
Includes 10 respirator filters per/package.