I have a yamaha 62 tenor
yamaha 4c which i no longer use
a yanigasawa 9 gap
a ebay 6c $45 metal mouthpiece
on all of these I can use with
Jave red 2.5
vandoren 1.5 to 2.5, the 1.5 on the 9 gap only
the only unusable reeds I ever bought were a 5, cant...