NATO 40mm Gas-mask restrictor cap for altitude training.

Last crawled date: 5 years, 8 months ago

This is a cap which will fit any gas-mask with a standard 40mm NATO thread including S10, FM-12, Israeli civilian etc and thus allows you to use it as an inexpensive altitude training mask. The cap comes as standard with a single 8mm hole but you could adjust this is CAD to suit your requirements (STL and Fusion 360 files supplied).