For many years Yamaha has been producing special custom-made mouthpieces for some of the world's top players. The players knew from the experience gained in their long careers exactly the kind of sound and response they wanted, and the Yamaha technicians knew from their long experience in crafting instruments how to deliver. As colleagues and students of these top players began to ask Yamaha for copies of these mouthpieces they decided to offer a select lineup of them in a new Signature Series. Now everyone can share in the results of this great co-operative effort betw playing literally all types of music in highly demanding situations. Jim's mouthpiece embodies his long experience of playing literally all types of music in highly demanding situations.