I will change this to sell individually. Thank you for viewing. This is a top (with case) for an AR Resonance trumpet mouthpiece, 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 I used it for several months, and there is some blackening on part of the rim. There are no problems 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. ■ Included items • AR Resonance genuine case (almost unused) ■ Retail price New retail price: Approximately 25,000 yen ⸻ ⚠️ Important notes • Please refrain from excessive price negotiations. • As this is a used item, please understand that it is non-refundable and non-returnable.