French Horn Mouthpiece TAD D6 Inner Diameter: 17.50 Throat: 4.3 Shank: B American Shank Used several times, so there are scratches from use. Please refrain from purchasing if you are sensitive to used items, as it has been in someone else's hands once. I will disinfect it again before shipping. I will not reply to price reduction comments. #FrenchHorn #Mouthpiece #TAD