Willie's TL BP0 Rim Inner: Gold Plated Bottom: Silver Plated Bass Trombone Mouthpiece ★ Cup Diameter: 27.95mm ★ Throat: 8.0mm BP0…1-1/4G rim combined with a 1G cup ★ Ordered and purchased in August 2025. At the time, 55,000 yen (tax included) ★ Used about 3 times. Almost new. I am selling it due to a change in the instrument I use. Due to subsequent price increases, it would cost 84,700 yen to order now. Supervised by Thomas Leyendecker of the Berlin Philharmonic Orchestra. With a deep cup relative to the rim diameter, it combines control and the fullness of the mid and low ranges. By adopting a heavy blank, you can obtain a sense of weight and stability. Also suitable for tenor players switching to bass.