Primos Hunting Pro Mallard Game Calls. This Game Call by Primos Hunting features a tuning hole in the bell or stopper which allows you to change the pitch of the call and sound like two different ducks. The Primos Hunting Pro Mallard Single-Reed Call can be used with very little air pressure. The Primos Hunting Pro Mallard Duck Call with its single-reed design makes this call an easy-to-blow call. Specifications for Primos Hunting Pro Mallard Game Call: Manufacturer: Primos Hunting Fabric/Material: Mylar Species: Duck Features of Primos Hunting Pro Mallard Game Call Easy blowing single-reed call Blows when wet Sounds great in timber or over open water Made with .010 Mylar reed for raspy quacks to clear high calls Tuning hole in the bell lets you change tone and pitch Package Contents: Primos Hunting Pro Mallard Game Call Primos Hunting PS804: Pro Mallard Game Calls