Continuously Adjustable Breathing Resistance Valve - Adjust your breathing resistance, from almost unhindered to actually breathless. It uses a standard 40 mm NATO gas mask connection.
A little bit different to my other projects. ;)
A gas mask sealing ring can be supplied.
Help me to find a proper text to put on the front panel! Should not be more than 3-4 words. Please write your suggestion in the comments. I managed to spend some time in the workshop. Made a panel penis gag in a used look. Hand-dyed dark brown leather with all black hardware.