Bob Reeves trumpet mouthpiece, under part for 4☆D4 692. This is a combination of a Perantucci 4☆D4 cup and a Bob Reeves 692 backbore. It should work well with a Bob Reeves 41 or 42 rim. I've included images with a 42 rim attached. Rim and sleeve are not included. There are no scratches or dents that would affect playing.