Model Number: Schmid model 8 Inner Diameter: 17.5mm Throat Diameter: 4.1mm Cup Shape: U Cup, Tilz marking MF, slightly shallow Shank: American I purchased this about six months ago, but it was so easy to play that I ended up buying a new one. I am now selling this one as I no longer use it. Personal Impression: This is a standard mouthpiece and was very easy to play. There is no box, so I will wrap it in bubble wrap for shipping.