These are the D'Addario Reserve clarinet mouthpieces. Lee Livingood who plays in the Utah Symphony is one of the consultants to the design and manufacturing of these mouthpieces. He is also one of the foremost mouthpiece makers and refacers in the country. I had the opportunity to meet with Lee Livingood at his home in Salt Lake City and to try some of his mouthpieces "customized" for sax players who double on clarinet. The two that worked the best for me were an off the shelf D'Addario X5 ($100) and one of his customized pieces for sax players ($200). I went for the "customized" one of course (so I could boast about playing a custom Livingood)
. The best part is that there is now an affordable top quality mouthpiece for clarinet students that is extremely consistent. I would recommend these mouthpieces to anyone, regardless of the style they play.