Level 3 Disposable Mask - (50/Box) - VetMed Solutions
Filtration Efficiency, BFE - Percentage of aerosol particles filtered at a size of 3 microns. Filtration Efficiency, PFE - Percentage of submicron particles filtered at 0.1 microns. Fluid Resistance, mmHg - Mask resistance to penetration by synthetic blood under pressure (mmHg). A higher fluid resistance provides higher protection.