Thomann Classic TF547 S, Bb- / F- Tenor Trombone with F-Attachment, Traditional design (closed wrap), Ø: 13.90 mm (.547"") Large bore, Brass bell Ø: 215.90 mm (8-1/2""), Nickel silver outer slide, Hard chrome plated nickel silver inner slide, Ergonomic thumb rest, Completely silver plated, Includes mouthpiece, Reka Super Slide and case with backpack straps