Horn Mouthpiece Alexander 8F Silver Plated Purchased used, but only used a few times and stored at home. This mouthpiece makes it easy to produce high notes. There is some dirt on the shank, but there don't seem to be any dents. European shank Please check the images. Outer Diameter: 25.5 Inner Diameter: 17.5 Throat: 3.7 Depth: 24.0 Rim Diameter: 4.00 Thank you for looking.