Otto Link Super Tone Master mouthpieces are known for their huge and bright tone they produce. They are very commonly selected by most jazz players due to their tone and projection. Super Tone Masters in particular have a slightly smaller chamber compared to the Otto Link Tone Edge, which also gives them a slightly brighter tone. 

This specific piece is a 5 Super Tone Master for tenor sax. It has the 5 stamped on the bottom of the mouthpiece. Get it before it’s gone!