Elk Mini Grunt Tube - The "Mini Grunt Tube" is compact & quiet. Measuring only 9 inches in length, it will fit in your pocket when not in use. Being made of rubber, it quietly stretches to over three times its original length making the "Mini Grunt Tube" the most versatile grunt tube on the market. The "Mini Grunt Tube" fits both the "Power Bugle" & "Royal Bugle" calls or it can be used with any diaphragm call.