Description : SM812M Mouthpieces inspired by the sound of the greatest jazzmen from the fifties to the present. Small chamber: Particularly foc and dynamic, ideal for lead alto. Medium chamber: Warm and expressive, ideal for section playing. A5 - Tip Opening 188, The tip opening preferred by history's greatest jazz soloists. A6 - Tip Opening 196, The most played mouthpiece, in every style. A7 - Tip Opening 204, The perfect balance in power and dynamic range. A8 - Tip Opening 210, An open mouthpiece with qualities similar to the A5 A9 - Tip Opening 225, Powerful and expressive.