King 2B trombone - Jiggs Whigham model with 0.491" (12.47mm) bore, one-piece hand-hammered 7-3/8" (187mm) yellow brass bell, lightweight slide, nickel silver outer slides, lacquered finish, Jiggs Whigham mouthpiece, woodshell case. This classic jazz trombone is noted for its projection and excellent upper range. An ultra-lightweight horn for exciting jazz lead performances.