Comparison of Mask Standards, Ratings, and Filtration ...
2020-4-10 · Generally, there are around 3 or 4 types of the more commonly used disposable face masks. They are single-use face masks, surgical masks, and respirator face masks. 3.0 Microns: Bacteria Filtration Efficiency standard (BFE). 0.1 Microns: Particle Filtration Efficiency standard (PFE).
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