Eastman E20D-TC-SB Sunburst Acoustic GuitarEvery Eastman ships to USA, Duty & tariff free. The Eastman E20D TC SB is a dreadnought acoustic guitar known for its rich, resonant sound and excellent playability. It features a Thermo Cured solid Adirondack spruce top and solid rosewood back and sides, giving it a balanced and powerful tone. The "TC" in the name denotes the Thermo Cured top, a process that enhances the wood's tonal qualities, mimicking the sound of a well aged guitar.