Thank you for viewing. I am selling a mouthpiece that I no longer use. [Product] Trombone Mouthpiece JK Yacht Car C.G. SB (Small Bore) *No box Signature model of Christoph Köstlin, principal player of the Berlin Philharmonic. Rim inner diameter 25.40mm Medium Deep Cup 6-1/2 equivalent Bach shank [Condition] Good condition *There are some scratches from normal use. [Notes] *Please refrain from purchasing if you are nervous. *No returns or refunds. *I will pack it carefully and ship it.