Picket Blackburn Trumpet Mouthpiece Signature Series - Jens LindemannTOP ONLY, Backbore Purchased Separately The Jens mouthpiece top models: made with in a polymethyl methacrylate material that feels like nothing else. Jens' Signature models include: Piccolo Top: A mouthpiece top compatible with either standard trumpet or cornet backbores, that enables a relaxed approach to playing the piccolo trumpet. Not an extreme mouthpiece by any standard, but rather a balanced piece. Approximately a 9 sized rim (0. 630") and