Rocky Mountain Select A Bull Elk Calling System -Rocky Mountain Calls offers you the most complete do it all elk calling system ever produced. The tone selector is simply dialed to the desired position for either small, medium, or large bull sounds with true back pressure. An expandable tube measure 23 inches when fully expanded, yet collapses to 17 inches for easier carrying. The tube tamer produces better sound quality and coupled with the conqueror external mouthpiece the call become easy to use for even the novice of callers. You can then remove the conqueror mouthpiece and use it as a diaphragm call. The most complete do it all elk calling system ever produced Tone selector Extra palate plate replacement reed Expandable outside tube Tube tamer