Buffet Crampon Chadash Barrel 66mm Bb-Clar.

I have the opportunity to try it on different clarinets, because I fix them in music school. I'm amazed at the difference in tone and playability.
Plastic clarinets also sound and feel like more expensive when playing with it. It also makes it much easier to play the highest notes. And also the instrument has generally more consistent playability. Fit is also more than good, tighter at the mouthpiece and a little looser at the other end.

Improvement in the intonation and response of the middle and high registers.