This mouthpiece, Gleichweit - B11-7 for French clarinets, it's practically new, only played one time. It was offered to me, but I play with Licostini A1. So it's the reason why I'm selling it.

Believe, it's a great mouthpiece.

This is the official site:

https://www.gleichweit-mundstuecke.com/en/mouthpieces/bb-clarinet/boehm-facing/

Just look at me feedback on ebay! Only selling great stuff.