B. Tilz Mc William mouthpiece for French horn, size 2, gold-plated. - Model: Mc William - Brand: B. Tilz - Size: 2 - European shank - Gold-plated Please check other sites for specifications. There are some minor scratches near the shank due to a habit of inserting it while twisting. It was easy to use with the gold plating, but I am selling it because I have switched to a different mouthpiece due to a change in instruments.