This is a gold-plated Bach mouthpiece, size 10 1/2DW. It has been used a few times and shows some wear on the throat, but is mostly in beautiful condition. Gold plating produces a softer, more delicate sound. The mid and high registers are particularly excellent, making it easy to play high notes. The "D" indicates a D cup, which is relatively shallow. The "W" stands for wide rim, meaning the rim is thicker. Recently, professional players favor thicker rims, with players like Eric and Wayne Bergeron using them. The benefits of a thicker rim include: it doesn't dig into the lips, provides a more stable feel, reduces fatigue, and makes high notes easier to play. This mouthpiece is recommended for those in wind bands who want a soft yet crisp sound when playing pop music, or for those who want to play high notes with ease! Official retail price for a new gold-plated model: ¥37,510