Part of the H.S. Strut University Series. The Combo Pack includes the Premium Flex Diaphragm 3-Pack, which has everything you need to start calling wild turkeys. Includes the Double D, Raspy Old Hen and E-Z Rasp Premium Flex diaphragm calls with Infinity Latex, diaphragm call case and 30-minute instructional DVD on how to use diaphragm calls. Comes with turkey track window decal.