If you seek a Schilke mouthpiece for small or large shank euphonium or trombone, you'll find those in the trombone mouthpiece selection. These special Schilke mouthpieces are custom versions of the model 55 Schilke trombone/euphonium mouthpieces that are made to fit a medium-sized European shank euphonium or other instrument. Examples are older Bessons and the Willson model 2900. If your horn does not fit either small or large shank standard mouthpieces, this may be the right fit. Often in stock, sometimes made to order.