Schilke Silver Plated Large Shank Trombone Mouthpieces. Available in various sizes and specifications. 44E4 - Though a small cup diameter, this mouthpiece offers a very deep ; E ; cup and semi-flat #4 rim. 46 - Slightly larger than the 45, this is also a good beginners mouthpiece. 46D - The cup diameter and volume is slightly larger than the 46, producing a full, resonant tone. Also recommended for the younger baritone/euphonium player. 47 - For both professionals and students alike, this outstanding mouthpiece combines good response with superior tone quality and intonation. 47C4 - Like #47 but with a slightly wider, semi-flat #4 rim. 50 - Particularly adapted to the medium and large-bore tenor trombones. The Schilke standard options make this a fine all- around mouthpiece. 50C4 - The medium-deep cup and medium-wide rim make this mouthpiece an outstanding choice for medium and large-bore tenor trombones, combining a rich, full sound with a high level of efficiency and playability. 51B - This mouthpiece incorporates a large diameter with a medium-small ; B ; cup and small throat 51 - A large bowl shaped cup producing a rich tone quality. Ideally suited for large bore tenor and orchestral performers. 51C4 - Similar to the #51 with a slightly shallower cup, smaller throat and semi-flat #4 rim. 51D - One of our most popular, this mouthpiece offers a very large ; D ; cup and is excellent for the strong player. It is particularly suited for the Euphonium, producing a full dark tone. 52 - Slightly larger diameter than the 51, this mouthpiece produces a slightly broader sound. 52D - Like the 51D, the large ; D ; cup makes this mouthpiece ideal for symphonic trombone playing. Also a good choice for the Euphonium player requiring a larger diameter than the 51D. 52E2 - With its extremely deep ; E ; cup and narrower, rounder #2 rim makes this mouthpiece an ideal symphonic choice for the robust player. Also a good choice for Euphonium player requiring more cup volume than the 52D. 53 - This combination of large cup diameter and bowl shape is widely favoured by those who desire a rich full sound.