D'Addario Reserve Bb Clarinet Mouthpiece, X5Inspired by the most prized, vintage mouthpieces of the 1920s, Reserve harnesses modern technology, pioneered by DAddario, to recreate the incomparable mouthpiece craftsmanship of yesteryear. Millednot moldedfrom hard rubber for a higher level of consistency, every Reserve mouthpiece is machined to the strictest tolerances. Of course, the true beauty of Reserve lies beyond its polished angles, curves, and proprietary material to something far more