Hunters Specialties Triple Reed Premium Flex Elk Diaphragm Calls. Wayne Carltons Calls diaphragm calls feature long lasting Infinity Latex and Premium Flex frames for the most consistent stretch and sound on the market. Specifications for Hunters Specialties Triple Reed Premium Flex Elk Diaphragm Call: Manufacturer: Hunters Specialties Species: Elk Last Chance: Yes Country of Origin: USA Package Contents: Hunters Specialties Triple Reed Premium Flex Elk Diaphragm Call Hunters Specialties HS-WCC-70183: Triple Reed Premium Flex Elk Diaphragm Calls