ニューストンライン154 テナートロンボーン用の高価買取価格

The item you're referring to is the New Stone Lined 154 tenor trombone mute by Mikami. This mute is designed to be used with tenor trombones and features a bowl-shaped cup that helps to soften and modify the sound, making it suitable for various performance contexts. The "Stone Lined" designation suggests it has a specific construction that affects its tonal characteristics.
If you have any specific questions about this mute, such as its features, usage tips, or purchasing options, feel free to ask!