This is a trumpet mouthpiece. ■Manufacturer: Willie's ■Model: 1-1/2C χ-metal ■Finish: Silver-plated ■Outer box: Included ■Condition: Near-unused condition with only a few test plays. From the retailer's description: willie's newly developed material "X-metal" has a higher copper ratio than traditional brass, resulting in richer overtones when played and a characteristic dense, heavy sound with a strong core. Due to the higher copper content, it is slightly heavier (about 5%), but it allows for smooth airflow and excellent response, making it easy to achieve a dense resonance. This new material achieves willie's ideal characteristics: easy to play and produces a great sound.