The Phelps AMP Series 3 Packs group three diaphragm calls with different latex thicknesses and stretch options to match different calling preferences and palate styles.

• Pinnacle: tall dome series for callers with a taller palate; authentic bull and cow sounds
• Summit: half-dome series with minimal dome feel; versatile bull and cow sounds
• Vertex: flat dome series for callers who do not want a dome style call but still want consistency and forgiveness