This surgical mask complies with ASTM F2100-11.
The built-in high-performance filter achieves high filtration accuracy of BFE≧98% PFE≧98%.
The nosepiece is made of aluminum and fits snugly around your nose.
It is smaller in both length and width than the regular size. Material: Polyethylene/polypropylene blend nonwoven fabric, aluminum plate
Size: Height 89mm, Width 165mm
Quantity: 50 sheets
