This diaphragm call was used by Corey to time the 2018 RMEF Elk Calling Championships.
A call designed to give the caller the option of bugling very aggressively or very passively.
It also cow calls very well.

A call designed to give the caller the option of bugling very aggressively or very passively. It also cow calls very well. #C2 
 
The “Slotted Dome TST” elk diaphragm call is designed to be placed further forward in your mouth, behind your front teeth, this helps to prevent gagging and gives you easier control of the latex. To operate the call, place the “Slotted Dome” upwards to the roof of your mouth, latex down and open end of the diaphragm towards the front of your mouth.