AR Resonance Euphonium Mouthpiece Backbore for Sale. The nickel material provides a clear, brilliant sound compared to brass or bronze, and it seems relatively easy to control. The finish is raw (unplated). It produces a straightforward tone with good response. (※The above is just my personal impression, so please refer to the manufacturer's website for details.) Thank you for your consideration. Product Details: Euphonium large shank mouthpiece backbore only Material: Nickel Finish: Raw (unplated) Size: M size (M72E) ※Box and leather case not included. There are no noticeable scratches or dents, and the condition is very good. However, it is strictly a used item, and there may be some scratches and discoloration from use. Please consider purchasing only if you understand this. Reference: Please refer to the information from the domestic general agent for the current price and product description. https://trumpet-store.jimdofree.com/a-r-トロンボーン他マウスピース/ It's a great deal, especially since prices are currently high. #Euphonium #AR Resonance #AR Resonance #Mouthpiece #Backbore