Primos Hunting Sonic Dome Series Double Game Calls. These Game Calls by Primos Hunting feature two latex reeds made by Primos Hunting to perform true to life elk sounds. The Primos Hunting Sonic Dome Double Reed Elk Call is designed to automatically position itself correctly in your mouth so you can comfortably and naturally project the sounds of an Estrus cow as well as several bulls in the distance. For an effective elk hunting trip make sure you bring along the Primos Hunting Sonic Dome Double Reed Elk Call. Specifications for Primos Hunting Sonic Dome Series Double Game Call: Manufacturer: Primos Hunting Fabric/Material: Latex Species: Elk Features of Primos Hunting Sonic Dome Series Double Game Call Two latex reeds Reproduces Estrus cow and herd bulls sounds Package Contents: Primos Hunting Sonic Dome Series Double Game Call Primos Hunting 1642: Sonic Dome Series Double Game Calls