Gas Mask Control Valve 40mm

For those times when you feel like your gas mask lets in too much air. Easy to print with no supports needed.

Fits NATO 40mm gas mask intakes.

USE AT YOUR OWN RISK
NSFW by association of my other accounts

UPDATE: I made the threads fit better, and added a decorative knob. It can be tightened all the way and still allow full airflow (see pic)