The Rocky Mountain Wapiti Whacker Bugle Tube will create all sounds including the high pitch screaming challenge, location and display calls of a bull elk. With all the innovate ideas put into this bugle tub, you can expect the accuracy, realistic and ease of use in this Bugle Tube. Very realistic! The mouth opening is 1 inch and the complete length is 20 inches. Buy yours today at Sawyer's Country Edge.