Bach 6.5AL Large Shank Trombone Mouthpiece

·Medium-deep Cup/25.40mm Diameter ·Medium-wide/Well-rounded rim ·.261" G Throat/420 Dark Backbore Designed to produce a Tuetonic quality. Recommended for euphonium players who desire a round/mellow tone with great carrying power and volume. These large shank mouthpieces fit trombones with a .547" bore and bass trombones with a .560" bore. Bach mouthpieces are crafted with meticulous attention to detail, combining precision engineering with top-quality materials to produce unmatched tonal richness, projection and control. Made in the USA!