The Morgan Protone Alto Saxophone Mouthpiece is hand-faced in the Morgan shop. It is made of a hard rubber-and-synthetic mix containing 30% natural rubber (double the government's requirement of 15% to be called a rubber mouthpiece). ProTone student alto sax mouthpieces are given the same attention as the top-line Morgan models. Their curves, tip, rails, and more are all cut and shaped by hand to the same exacting specifications.