ニューストンライン120トランペットミュートの高価買取価格

The product you're referring to seems to be a New Stone Lined (ニューストンライン) Derby mute specifically designed for trumpets. The catalog number is 2500260015144, and it looks like it is being offered at a clearance price (在庫処分特価!!), which indicates a special discount or sale to move inventory.
If you have specific questions about this mute, such as its material, sound characteristics, or where to purchase it, please let me know!