HMG Kin-kan Gijutsu original mouthpiece for French horn. - Model Name: R4a+ - Material: Inner rim gold finish - Inner Diameter: 17.75+ (slightly larger than 17.75) - Throat: Standard (4.05) - Cup: V-cup - Reference Price: 27,500 yen ※ European shank Thank you for viewing. This is a handmade original mouthpiece from H M G. It has only been used a few times after purchase, so I think it's in beautiful condition.