The Blessing BTB-88 trombone series with F attachment has long been a great value in trombones. These large bore tenor trombones with a bore size of .547" are American-made in Elkhart, Indiana. This instrument effectively fills the gap between the medium bore trombone and the bass trombone within the trombone spectrum. These instruments have all-around versatility and are very popular in the American school music scene. The yellow brass bell is 8-1/2" and the instrument has a standard (closed) wrap F Attachment with a tapered rotor valve. The hand slide is constructed of bronze outer rails and is carefully aligned and hand-lapped for the most precise fit possible and smooth action.