bubbly-effect through inside airtube.
with reducing valve , by screwing up and down the air volume can be controlled very accurately and1,6" (40mm) round thread connector (standard connector to ) fits our masks with appropriate connection, the tube connection SA2, our tees, connectors and many gas masks

Product safety

Information on the manufacturer:

Hans-Peter Michels
Gartenstrasse 13
36381 Schluechtern
Germany
[email protected]
https://www.studiogum.com
Safety instructions and warnings