Introducing the Rocky Mountain Hunting Calls Ultimate Elk Bugling System, a system designed specifically to replicate the bull elk bugle. FeaturesThe Wapiti Whacker utilizes the V.E.T.T. calling system placed in the mouth end opening to help create better backpressure, aiding in easier to obtain note changes.The dimensions of the inner hole size help to create deeper, raspier, base sounding chuckles, growls and grunts, along with the larger chamber to create the accuracy and realism of elk calling.V.E.T.T. mouthpiece enlargment ring included for optional 1 1/2" mouthpiece opening.The rubber boot eliminates plastic vibration sounds.The overall length for ease of packing in the mountains.Mouth opening: 1.5"Length: 20" IncludesSure Fire Bugle adapterBlack Magic mouth diaphragmWapiti Whacker Bugle tube featuring the V.E.T.T. systemCamo cover and lanyard