B-Stock, Kanstul 1570 T Bb/F-Tenor Trombone, O.E. Thayer f attachment (.562 "), large bore: .547 ", open wrap, one piece brass bell, brass outer slide, bell diameter: 8 1/2 ", interchangeable mouthpipe, lacquered, incl. case and mouthpiece, B-Stock with full warranty, may have slight traces of use