Gottsu Double Ring 2022 Tenor #110 (Tip Opening: Equivalent to Otto Link #8) Tenor Saxophone Mouthpiece Thank you for viewing. The early model of the Otto Link long-selling mouthpiece, Super Tone Master (STM), is said to be the model with double rings on the shank, commonly called the Double Ring. It is very easy to play, with a dark sound, and has good response, making it very easy to play. Especially the thick sub-tones in the low register are very attractive, but I am selling it because it is not my preferred tone. A Selmer metal ligature is included, so it can be used immediately. Please consider it.