Our Persuader II uses our Quick Cap silicone diaphragms available in 3 thicknesses; spike, raghorn, and herd bull. With exceptional flexibility the Persuader II can deliver a full range of elk sounds that include bugles, grunts, and squeals. A large diameter head allows the caller to bugle using a large spectrum of pitches, from a deep groan to the piercing high note. Other tubes on the market fail to produce the hollow tones of grunts and chuckles like the Persuader II. The included True Timber fleece camo sleeve helps keep your tube quiet and concealed.