Quaker Boy Pro III Game Call. This turkey call is the ultimate clear mouth yelper and lets you duplicate all turkey sounds. The Quaker Boy Pro III Call is one of Quaker Boy's most popular turkey calls. Specifications for Quaker Boy Pro III Mouth Diaphragm Turkey Call: Manufacturer: Quaker Boy Additional Features: Turkey/Hen/Jake Sound Fabric/Material: Custom Latex Species: Turkey/Hen/Jake Package Contents: Quaker Boy Pro III Game Call Quaker Boy 11104: Pro III Game Call