Used short cornet mouthpiece. Valve oil is more than half full, so I'll include it as a bonus. Please let me know if you don't need it when you purchase. Rim Inner Diameter (mm): 16.7 Throat Diameter (mm): 4.5 Slightly larger rim inner diameter than 11E4, resulting in a richer volume. Deep V-cup provides the original soft sound quality of the cornet. Brand: YAMAHA Features: Larger rim inner diameter My daughter only used it a few times in her club activities, but there is slight rust and blackening due to aging. There are no dents, so it can be used without any problems. It has been cleaned with a dedicated brush, but please consider this as a used item. It will be shipped via Rakuraku Mercari delivery after being protected from moisture.