This is a Tosca Green Line barrel (A650), the top-of-the-line model from Buffet Crampon. It is included with the A clarinet, but can also be used without issue on the B♭ clarinet. You can easily achieve a powerful and rich sound simply by replacing the barrel on your Tosca or other Buffet Crampon models. This is a very well-balanced piece. How about it if you are looking for a beautiful barrel with the old logo?