Instant purchase OK. French horn mouthpiece Alexander 8F (No box, mouthpiece only) Rim inner diameter 17.5 / Throat diameter 3.7 / Cup depth 24.0 / European shank Used for about 2 years. There are scratches from polishing and signs of use, but there are no dents or distortions in the shank. Cleaned. This is a used item, so please purchase only if you understand.