The Resonator line is fitted with a lightweight aluminum resonator directly into the Mahogany body. The resonator gets a brass cover and the body gets elegant F-holes to give this model its distinct appearance. *Fits all Kala Tenor Ukulele Hard Case and Bags. SPECS SIZE: Tenor TOP: Mahogany BACK & SIDES: Mahogany BINDING: Pearloid FINISH: Sunburst Satin NECK: Mahogany FINGERBOARD: Walnut NUT: GraphTech NuBone? SADDLE: Maple COVER: Brass CONE: Aluminum HEADSTOCK: Standard STRINGS: Aquila Super Nylgut? ELECTRONICS: NA