Tube gag
From wipipedia.org
A tube gag uses a tube as part of the construction of the gag. Depending on the size and stiffness of the tube it can be used as a more complex version of a ring gag. Flexible tubes can also be added to other gag types to provide a breathing tube (a breathe-through gag).
It is possible to have an inflatable tube, hence combining this type of gag with an inflatable gag.
