I purchased this in November of this year and tried it twice, but it didn't suit me, so I'm selling it. There are no scratches, so it's practically a new product. Symphony Inner diameter: 18.0mm / Throat diameter: 4.0mm European shank This model is suitable for large orchestra performances and is appealing for its powerful f-ff sound. You can blow with confidence without the sound opening up. Also, the sound quality is calm, and the playing feel is stable, making it an attractive model.