HS Strut diaphragms with tone trough create perfect pressures by guiding air over the latex, while assisting with placement in the hunter's palate. The premium flex process and infinity latex make for longer lasting calls that are more consistent and comfortable to use. In fact, the latex comes alive. this 2-pack includes both the tone trough raspy old hen and double spandex diaphragms. Each featuring 2 ultra-thin reeds, switch back and forth between the two to create a variety of realistic hen tones.