The Black Foot grunt went through a rigorous design and research process with Blackbelt Strutter Gane Calls to give the most perfect and accurate grunt tube on the market. We spent weeks going through multiple exhaust tubes before finalizing the thickness, length and durability of this exhaust. It throws a wide range of frequency without ever having to adjust the reed. Being quiet when it counts was one of the most important parts of building a lifetime call. When you're in the moment and noise is the deciding factor, our flexible extendable exhaust tube is what you want. Get down deep by stretching the tube or let it hang for soft low but crisp contact grunts. We offer a limited lifetime warranty on this call! If anything happens to it just mail it back and we will fix it same week and have it right back out to you. We stand behind this call as much as we stand behind our farm fresh urines. Buy one now and never buy another grunt.