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Face mask filters, three type PM2.5 CD084

Face mask filters, three type PM2.5

Face mask filters, three type PM2.5  

Photographer: Christopher Jones,   Copyright: Crazy Dave Promo Ltd,   Credit: CrazyDavePromo.co.uk

Wherever you use this photo you must simply acknowledge crazydavepromo.co.uk for example say "Photo credit: crazydavepromo.co.uk". For more details see How to use this image.

These three face mask filters are replaceable designed to slip into fabric face masks. PM means particulate matter and 2.5 is the micrometer diameter of the smallset particles that are filtered out.