Selmer S-80 C* Mouthpiece for Alto Saxophone (S402C1) Square cross section in the chamber Great for a "step up" mouthpiece Tip opening: 1.70 Facing length: 22.00 Facing length: 22.00, Tip opening: 1.70 Square cross section in the chamber Great for a "step up" mouthpiece Tip opening: 1.70 Facing length: 22.00 Facing length: 22.00, Tip opening: 1.70 Standard in professional mouthpieces Improve the sound and response from their instrument Ideal for most any style of music