This wooden call is a made from a native wood and is known by several names; Bois D'Arc, Hedge, Hedge Apple, or Osage Orange.  It is one of the hardest woods in the United States.  Bois D'Arc is one of the traditional woods used by call makers due to its hardness and durability.  This is an excellent call that has a great ducky sound.      
 
Please consider these reed/insert explanations to help in choosing your preferred call selection:
Perfect Timber - Single reed with smaller exhaust hole (considered a softer call but still plenty loud)
T-Rex - Double reed with a plastic and metal reed and a timber exhaust hole.  The vibration of the metal reed adds a ducky raspy sound and the timber exhaust is a softer style call.
World's Best Double Reed - Double reed with two mylar reeds but with an open water exhaust.  Using an open water exhaust adds volume and compliments the ease of use of a traditional double reed.