Tone Trough diaphrgms aid in pallet placement and properly direct air over the reed. Also reduce the “gag reflex” for those that have a hard time with diaphragm calls. Includes the Premium Flex Raspy Old Hen, Cutt’n 2.5 and Split V III Tone Trough diaphragm calls with Infinity Latex® and instructional DVD. Comes with Calling Case.