The original Audubon Bird Call consists of a custom engraved birchwood roller and a zinc plug. When twisted, this instrument will make a variety of sounds which attract wild birds. With reasonable care, and periodic re-application of rosin from the included capsule, the call will last a lifetime. * Includes carry bag * Includes red rosin capsule to renew the call * Measures 2 1/2" long Each Audubon Bird Call is handmade and individually tuned and manufactured in the USA for over 60 years