Tone Color Changer 【Nikukyu】 Brass × Copper For Mouthpipe Along with its cute appearance, it utilizes the copper components to create: ・A soft and warm sound ・A gentle resonance This product will make your performance even more enjoyable. It's very cute and stylish. It's attached to the part where the mouthpiece is inserted (it's not a ring). I purchased it intending to use it on a different part, but I couldn't attach it there, so I'm selling it as an unused, beautiful item. It's currently out of stock and difficult to obtain. If you're interested, please take this opportunity (*^^*) #Trombone #Bass Trombone #BRAKUL