These are a hand molded duplicate of Big Sean's very own guts he has been hunting with for over 16 years. These guts have a very unique and goosey sound that will turn geese on a dime. Big Sean has been using these guts the last few years on local, hard to kill geese and the response of the birds is crazy. These guts have a tone that drives honkers nuts and makes them commit! They will fit all of our calls here at BSCC and will be available with all of our Goose calls we make. All guts are layered with our exclusive liquid rubber for an ever more realistic sound.