Make your own carbon filters

I have this on my list to make. I own a 3M Respirator and right now replacement filters are expensive. Of course same issue with other 3D printed items, particles could still get inside thru the print. But it could be a good temp replacement.

https://www.instructables.com/id/3D-Printed-Activated-Carbon-P100-3M-Respirator-Fil/

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