The clear contours and core sound are attractive. I am selling it because it no longer fits my bore size. It will be cleaned, packaged, and shipped. Silver-plated finish. A mouthpiece developed by Mr. Griego, an engineer in the trombone development department of Getzen, USA. Cup inner diameter: 25.5mm, Throat diameter: 7.11mm Please consider this item, understanding that it is used. #Trombone #Mouthpiece #Grego