The Wayne Carlton Hot Cows Tone Trough Diaphragm Elk Calls are equipped with a premium flex frame to ensure consistent fit and stretch from call to call. Trough's sound chamber produces the highest pitched elk bugles and most authentic, nasally cow calls on the market. A must-have for any serious elk hunter, the Hot Cows 2-Pack includes the Cow & Calf Tone Trough and Buglin' 2.5 Tone Trough elk diaphragm calls.FeaturesPremium flex frame ensures consistent fitEasy to blow calls Less required pressure prolongs the life of the call and reedCow & Calf Tone Trough and Buglin' 2.5