Long Cornet Mouthpiece YAMAHA 11A4 Included when I purchased the instrument. Used only for a few trial plays. There is a small scratch on the side of the rim, but it does not affect playing. The outer box is not included, so it will be shipped in simple packaging. Manufacturer's specifications below: Rim inner diameter: 15.99mm Throat diameter: 3.65mm A medium rim inner diameter with a shallow cup, characterized by a brilliant high range. Suitable for piccolo trumpet. Please refrain from purchasing if you are concerned about the scratch. No returns or exchanges, please.