Let me start by saying I do not smoke, and you shouldn't either 😉

This design allows you to use a standard 8mm diameter, 15mm long cigarette filter as an inline air filter. Keep in mind that depending on the porosity of the filter you use it can affect the flow of air.

This was designed to be printed on a resin printer, I have not tested this with an FDM printer. I recommend using a small amount of silicone grease on the threads to improve air tightness.