Either way, one might even go so far as to collecting the M15, CL5, and BD5 B flat Clarinet Mouthpieces or the CL4, CL5, and CL6 Masters B flat Clarinet Mouthpieces, and the results are always the same.

Best clarinet mouthpiece I have ever played

He is a 4th year player in High School marching band and loves his bass clarinet.