Original HMG brass instrument technology mouthpiece for French horn. - Model name: R4a+ - Material: Gold-plated inner rim - Inner diameter: 17.75+ (slightly larger than 17.75) - Throat: Standard (4.05) - Cup: V-cup - Reference price: 27,500 yen ※ European shank Purchased used and test-played a few times. There are small scratches overall, but there are no dents or damage that would interfere with playing, and the condition is good.