Developed in cooperation with acclaimed player Philip Farkas the Holton Farkas DC yields extended range and power along with a gorgeous tonal color. This French horn mouthpiece offers excellent embouchure development for beginners as well as the easy playability pro-level players need for intricate symphony work. The DC features a deep cup a 17.07mm diameter and a 4.83mm throat; it boasts a medium-shaped rim producing clean attacks with a massive resonant velvety tone. Holton Golden Plated French Horn Mouthpiece DC. Cup Size DC Cup Depth Deep Rim Shape Farkas French Horn Mouthpiece.