This is a trumpet mouthpiece. ■ Manufacturer: Kanstul ■ Model: BNY 7C ■ Finish: Silver-plated ■ Outer Box: None ■ Condition: Excellent condition with no noticeable scratches or distortions. This is a copy of a Bach NY era 7C. It's a so-called Harces model. It has a Warburton-compatible screw size. Kanstul's copies seem to be good copies. The originals are incredibly expensive and also have considerable individual variations, so I think this is a very valuable product, along with the advantage of being able to combine it with your favorite backbore. It has been discontinued, so its rarity will increase in the future. How about getting one now!