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PM2.5 mask filter CD086

PM2.5 mask filter

PM2.5 mask filter  

License: Creative Commons Attribution License.

How to use this image.

A PM2.5 mask filter front view. These are replaceable and designed to slip into pockets of fabric face masks.

PM means particulate matter and 2.5 is the micrometer diameter of the smallset particles that are filtered out.

Three face mask filters on a white background.