Use these filters for all sorts of things like spray painting…etc a cheaper alternative

I'm using a few layers of Filtrete filter material with a layer of active carbon in between. If you plan to just use surgical mask or some other thin filter material print the normal version. If you want to add active carbon or some other filter material for the best filtration print the extended version and the back cap.

This is what i used for the filter material can be found at any store that sells in home filters. Other brands should work fine also. Just make sure to get the best filter material available these are rated for 99.9% bacteria and virus and are static charged.
https://www.filtrete.com/3M/en_US/filtrete/products/~/Filtrete-Healthy-Living-Air-Filters/?N=4315+3292675507+3294529207&preselect=7568680+3293786499&rt=rud

This is the active carbon/charcoal I use, it can be found at nearly any pet store or bigger chain store in fish tank isle.
https://www.chewy.com/marineland-black-diamond-activated/dp/125922?utm_source=google-product&utm_medium=cpc&utm_campaign=hg&utm_content=Marineland&utm_term=&gclid=EAIaIQobChMI0Lqmy-rV6AIV7R-tBh0SQARtEAQYASABEgJ2xPD_BwE

There are two versions.

One Short, One longer to fit more filter medium

Print Settings

Printer brand:

Creality

Printer:

Ender 3

Rafts:

No

Supports:

No

Resolution:

.2mm

Infill:

40%+

Filament brand:

esun

Filament color:

black

Filament material:

pla+

Notes:

No supports should be needed print hexagon side flat on the bed