Euphonium/Trombone Mouthpiece Randefalk R4 Cup Inner Diameter: 25.70 mm Cup Outer Diameter: 39.20 mm Bore Size: 7.10 mm Cup Depth: 35.50 mm Length: 80.00 mm Backbore: 10.30 mm Large Shank Finish: Gold Includes original drawstring pouch The current standard specification has a separate cup and shank, but this is an integrated type. Randefalk is recently popular in brass bands, etc. In brass bands, it is known that Gary Curtin, the principal euphonium player of Fodens Band, uses it. It is not distributed domestically, so please consider this opportunity. Manufacturer's HP product introduction page https://randefalkmusic.com/collections/moutpieces/products/euphonium #euphonium #euphonium #euphonium #mouthpiece #Randefalk #randefalk