Horn mouthpiece supervised by Professor Will Sanders of the Karlsruhe University of Music and the Maastricht Conservatory. SF3 17 1/4K (Inner diameter 17.25mm / Throat diameter 4.3mm / V-cup) There are scratches on the metal parts, but there is no problem with the sound quality. Retail price: 19,520 yen (tax included) The price has increased by 3,000-4,000 yen since August. Includes a brush and stickers.