This is a Tilz CE1 horn mouthpiece. I purchased it used and only tried it a few times. It's clean with only normal wear and tear on the shank, with no major dents or dings. Inner Diameter: 18.0mm Bore Size: 4.4mm Cup Depth: Medium Deep Rim Thickness: Medium Wide Shank: European Shank ----- This is a mouthpiece from Tilz, a long-established German mouthpiece manufacturer representing Europe. It is the model of Christoph Eß, principal horn player of the Bamberg Symphony Orchestra.