Horn Mouthpiece Giardinelli F16 American Shank The information is vague, but... Inner Diameter: 17.5mm (Feels smaller than this in reality) Bore Size: 4.5mm Cup Depth: Medium Rim: Thin Currently discontinued and difficult to obtain. The price at the time of purchase was 9,000 yen. A must-see item for Giardinelli fans. There is some blackening due to long-term storage, but it's almost new as it has only been used for testing. It will be sold in its current condition to avoid the risk of plating wear. There are no dents or scratches. It will be shipped via Nekopos in an air cushion bag. Please purchase only if you understand that this is a used item.