The Yamaha 60BL (often listed as BL-60B) is a large-shank silver-plated bass trombone mouthpiece, frequently used for its clear, versatile tone and comfortable, slightly thicker rim. It features a 27.83 mm inner rim diameter, a semi-shallow cup for quick response, and a 6.92 mm throat. This model is ideal for players seeking a balance of power and articulation in the low-to-mid register.