Primos Hunting High Roller Game Calls. This Game Call by Primos Hunting features a roller built into the High Roller that makes the whistle flutter automatically just like the whistle of ducks. The Primos Hunting High Roller Duck Call can also reproduce the mallard drake grunt and whistle of the widgeon and teal. The Primos Hunting High Roller Pintail Call allows hunters to call ducks with convenience. Specifications for Primos Hunting High Roller Game Call: Manufacturer: Primos Hunting Fabric/Material: Polycarb Species: Duck Features of Primos Hunting High Roller Game Call Built in roller bar that makes the fluttering whistle automatically Produces the whistle of the pintail mallard drake widgeon and teal Package Contents: Primos Hunting High Roller Game Call Primos Hunting 838: High Roller Game Calls