Description This call is built on our smallest frame and works great for anyone, but especially well for women and kids. It will produce bugles of a younger bull as well as nice cow mews. The âSlotted Dome TSTâ 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 âSlotted Domeâ upwards to the roof of your mouth, latex down and open end of the diaphragm towards the front of your mouth.