Cornet mouthpiece, Bach 6C. This is a near-period piece, dating from the early 1980s to early 1990s. Rim inner diameter: 16.2mm Throat diameter: #27 (As per catalog) I used this when I was a student, but I'm selling it because the size no longer suits me. It shows considerable signs of use, and there are multiple scratches on the side of the rim, so please refrain from purchasing if you are concerned about this. (See photo 4) There is no box, so it will be shipped in simple packaging. No returns or exchanges, please.