Dante Tone Booster, PGP (pink gold plated) on the brass body. This is an acoustic improvement item used by inserting it into the lyre socket of a saxophone. I'm selling this because I sold the Selmer instrument that I used it with. I haven't seen it anywhere else, so I think it's quite rare. It makes the sound thicker while maintaining the original playing feel. I liked it because when I practiced with it, I felt like the sound became better even after I took it off.