The Rocky Mountain Hunting Calls Golden Tone Plate multi pack is the perfect choice for those who prefer the GTP diaphragms. The #134 Black Magic, The #135 Reaper and the #139 Spellbound all in one package.FeaturesModel #134 - It is an advanced design that will bugle like a frustrated bull. It also has the capability of producing excellent clarity when making cow mews and chirps.Model #135 - It was created to make very aggressive bugles sounding like a frustrated bull challenging for the herd. You can also get it to reproduce the estrus whine of a cow in heat.Model #139 - Designed for the caller who loves to challenge a bull. Its double latex design will make incredibly realistic display bugles.