Trumpet mouthpiece. ■ Manufacturer: Schilke ■ Model: 13C4 Sleeve Modification ■ Finish: Gold Plated (Rim Inner) ■ Outer Box: None ■ Condition: Clean condition with no noticeable scratches. This is a Bob Reeves sleeve modified product. The effect of the gap is more significant than expected, so please try to find your preferred setting. The 13C4 is a well-balanced model, not too big and not too small.