Renold O. Schilke had a profound influence on the development of brass mouthpiece design and pedagogy in the 20th century. His wisdom and insight have influenced several generations of performers, educators and students while setting the standard for other manufacturers. A Heavyweight profile trumpet mouthpiece option is available in the following best-selling rim sizes only. The additional mass provides a darker focused sound, with more secure slotting and increased projection at louder dynamic levels.