Vincent Bach 1-1/4G Trombone Mouthpiece Large Shank (Bach 341-1FG)Vincent Bach 1 1 4G Large Shank Bass Trombone Mouthpiece New The Bach 1 1 4G offers a slightly smaller alternative to the massive 1G while still retaining the depth and breadth of tone favored by modern bass trombonists. With a 27. 50 mm cup diameter and a deep cup, it produces a broad, sonorous sound that blends well in orchestral and large ensemble settings. The medium thin, well rounded rim provides comfort and control, while the . 276 throat and