Latex Mouthpiece Howler by Foxpro "Mr.Mouthy Combo

[michaelmoheb562]

how does the latex make the call howl???

does the latex need to be a certain length???]

 

[crapshoot]

All sound is made by vibration.
The sound will vary depending on thickness of the latex as well as how much it is stretched.
If you are wanting consistency, I'd just buy factory replacements.