Thank you for viewing. This is a mouthpiece that came with the instrument I recently purchased, a Meinel Weston. It is a new, unused item, stored in its bag, and has no scratches or stains. It is from the icon series sold by Buffet Crampon, and its specifications are almost the same as Bach's 18, but it feels lighter than Bach. It is a recommended mouthpiece for B.C. tubas. Specifications: Cup Inner Diameter: 32.30mm Rim Width: 7.65mm Bore Size: 8.30mm Cup Depth: 38.80mm