Thank you for viewing. This is a set of AR Resonance trumpet mouthpiece top and backbore, highly regarded worldwide. ■ Top: LB40 (Brass) • Size: Large (L rim) • Inner rim diameter: Approximately 17.0mm (B type rim) • Cup: B cup (medium deep) • Rim shape: 40 rim (slightly flat for stability) • Material: Brass • Weight: Standard weight Used for several months, there is some blackening on part of the rim. There are no issues with use. It features a core sound and smooth playability, and is suitable for a wide range of genres such as brass band and classical music. I am selling it because I purchased a model of a different material and no longer use this one. ■ Backbore: Classical S (Nickel Silver) • Model: Classical S • Material: Nickel Silver • Condition: Used once, almost new The popular Classical S model! It has good response, and adds a clear and present sound unique to nickel. ■ Accessories • AR Resonance original case (almost unused) ■ Retail Price New retail price: Approximately 50,000 yen (total for top, backbore, and case) ⸻ ⚠️ Important Notes • Please refrain from significant price negotiations. • As this is a used item, no claims or returns are accepted.