Hunters Specialties Li'l Red Wolf Howler Diaphragm Calls. For the most consistent fit and stretch its built on a Hunters Specialties Premium Flex frame and features Infinity Latex for the highest quality wolf sounds. Specifications for Hunters Specialties Li'l Red Wolf Howler Diaphragm Call: Manufacturer: Hunters Specialties Fabric/Material: Infinity Latex Species: Wolf Country of Origin: USA Package Contents: Hunters Specialties Johnny Stewart Lil Red Wolf Howler Diaphragm Call Hunters Specialties HS-JS-WH-1: Li'l Red Wolf Howler Diaphragm Calls