Willie's TL BP0 Gold-plated GP, Large Shank Bass Trombone Mouthpiece ★Cup Diameter: 27.95mm ★Throat: 8.0mm BP0...Combination of 1-1/4G rim and 1G cup ★After purchasing this used item, I've only test-played it a few times. *The original box is not included. It will be shipped with bubble wrap for protection. There are insertion marks on the shank, but no dents or deformation. The previous owner purchased it in 2019 and used it for about 2 years. This model was supervised by Thomas Leyendecker of the Berlin Philharmonic Orchestra. It has a deep cup relative to the rim diameter, offering both control and a rich sound in the mid and low registers. The use of a heavy blank provides a sense of weight and stability. It is also suitable for tenor players switching to bass trombone.