Ultimate Brass Bass Trombone Mouthpiece Curran Recital Large Shank Silver Plated (SP) Body: Hammered Finish Cup Diameter: 28.93mm Throat: 8.08mm This item was purchased used and has been test-played a few times. *The original box is not included. Please note there are some noticeable insertion scratches on the shank. The inside of the cup has some blackening that could not be removed by cleaning, so it has been lightly polished. Neither of these issues affects playability.