The Selmer S80 tenor saxophone mouthpiece is a popular design, and one of the biggest sellers in the marketplace. It is constructed from hard rod rubber, which lends it outstanding stability, accuracy and consistent facings. Whereas most mouthpieces have an arched cross-section in the chamber, the S80 is square. Students stepping up from a stock mouthpiece will experience a dramatic improvement in register changes and tonguing immediately in terms of tone and response.