Bach 50B3O Bass Trombone

Bach "Stradivarius" - Double in-line independent rotor system, key of Bb/F/Gb, .562" bore, 9-1/2" one-piece hand-hammered yellow brass bell, open wrap F attachment with traditional rotors, yellow brass outer slide, clear lacquer finish, Bach 1-1/2G mouthpiece, 1845C woodshell case.