This is the LS model from Aizen, a Japanese manufacturer known for its high-quality handmade mouthpieces. The opening is 6 (2.3mm). This model is based on a vintage Otto Link and is characterized by a dark and thick tone. It features a large chamber and a rollover baffle. It's very easy to play and has excellent intonation. Subtones are also easy to produce, making it highly recommended for those who prefer a mellow performance. It's the perfect mouthpiece for playing softly in cafes or bars! I've attached a patch, so there are a few marks left from it. It was very good, but I felt the opening was a little too narrow for me, so I'm reluctantly selling it. This listing is for the mouthpiece only. A ligature is not included. Retail price: ¥36,300