Bach 50A3G Bass Trombone, Bb / F / Gb / D Bass trombone, With Hagmann ""Free Flow"" quart and quint valve, Inline system, Open-wrap construction, Brass outer slide, .562"" (14.28 mm) L-hole, Ø 9,5"" (241,50 mm) gold brass bell, Nickel-silver grip, Clear lacquered, Includes Bach 1-1 / 2G mouthpiece and deluxe wooden case