Primos Hunting Sound Plate Series Sentry Plate Single Game Calls. This Game Call by Primos Hunting is made up of two thin latex reeds with a "Y" cut on the bottom reed. The Primos Hunting Sentry Plate Single Elk Sound Plate w/ Y-Cut automatically positions the call in your mouth at the right place and angle making elk calling easier. The Primos Hunting Sentry Plate Single Elk Call Sound Plate has a "Sound Plate " set at 16 degrees which is perfect for cow calf talk and spike bull bugles perfect for. Specifications for Primos Hunting Sound Plate Series Sentry Plate Single Game Call: Manufacturer: Primos Hunting Fabric/Material: Latex Species: Elk Features of Primos Hunting Sound Plate Series Sentry Plate Single Game Call One thin latex reed 16 angle of Sound Plate Reproduces cow calf and spike bull sounds Package Contents: Primos Hunting Sound Plate Series Sentry Plate Single Game Call Primos Hunting 158: Sound Plate Series Sentry Plate Single Game Calls