Denis Wick Heritage 4ABL Trombone Mouthpiece [Model favored by the London Philharmonic] List price: ¥51,700 This is a model favored by trombonists in world-class orchestras, including the London Philharmonic Orchestra. The cup size is a size 4 (26.00mm inner diameter), which is slightly large, but it excels in ease of playing in the upper register and is particularly popular for 1st part playing in wind ensembles and film music. I purchased it around mid-January, but it didn't suit me, so I would like to pass it on to someone who can use it. • Finish: Gold plated • Cup inner diameter: 26.00mm • Throat diameter: 7.38mm