This is a Schmidt Digital 1.0 18 French horn mouthpiece. I am selling it due to organizing my equipment. Rim inner diameter: 18.0mm Bore size: 4.0mm Shallow cup V cup Purchased used and used a few times. There are minor scuffs from use, but no major damage that would interfere with normal use. Please check the photos for the condition. As this is a used item, please refrain from purchasing if you are concerned about minor details. Immediate purchase is welcome.