The original diaphragm elk bugle the Blue Double Reed is our biggest seller. It produces a complete range of elk sounds from cow calls to mid- to long-range bugles without ever intimidating smaller bulls. Reliable realistic and hands free it features durable Infinity Latex which absorbs significantly less moisture for long-lasting performance. If you’re going to use diaphragms to call elk use the ones designed by the man who revolutionized the art of calling elk.