HMG Brass Instrument Technology French Horn Mouthpiece R2aLB Inner Diameter: 17.25 Outer Diameter: 24.85 Rim: 3.8 Throat: 4.3 (Large Bore) European Shank V Cup The outer cup was given a hairline (matte finish) treatment as an additional order. Knurling is also applied. *Used a few times, but it is a used item. The new purchase price including various expenses was ¥28,050 (tax included). (The mouthpiece price seems to have increased now) I am selling it because it did not fit the shank of my instrument.