This is a Vandoren baritone saxophone mouthpiece, the B35. While the BL5 is popular these days, this mouthpiece gives the impression of projecting sound further than the BL5. The B25 and B27 have the characteristic thin beak of Vandoren mouthpieces, and their narrow tip openings make them difficult to control. However, this one has a thin beak and a wider tip opening, so you can produce a beautiful tone without a harsh sound. Ryota Azuma, the baritone saxophonist of the Quartetto Spiritus, uses the same model mouthpiece, so please listen to his sound on CDs, subscription services, YouTube, etc.