Buck Gardner Gander Hammer Polycarbonate Goose Call Combo -Double O-rings form the air-tight seal and our Pro Staffers hand-tune the calls to add their “magic” touch. The Gander Hammer is built with Quick Tune guts for easy cleaning and reassembly. The Straight Talk Goose Instructional CD that's included with this call will help you become an expert caller. You’ll be impressed, and get more bang from Buck. Includes: Instructional CD Smoke/Green