Hunters Specialties Alumni Pack Aluminum Frame Elk Diaphragm 4-Pack. The Beginner Red Single Reed produces cow/calf and young bull sounds and is a great call for beginners. The Super Blue Double Reed produces everything from cow calls to mid- and long-range elk bugles. The Herd Bull Triple Reed produces deep nasally cow calls and loud deep-tone bugles. The new Cow & Calf call rounds out the pack. Made with moisture-resistant Infinity Latex and an aluminum frame that allows for custom fitting to the users palate it comes with a durable plastic call case. Specifications for Hunters Specialties Alumni Pack Aluminum Frame Elk Diaphragm: Manufacturer: Hunters Specialties Fabric/Material: Aluminum Species: Elk Country of Origin: USA Package Contents: Hunters Specialties Alumni Pack Aluminum Frame Elk Diaphragm Hunters Specialties HS-WCC-70186: Alumni Pack Aluminum Frame Elk Diaphragm 4-Pack