Willie's YU TAMAKI Jewelry series is a new-concept mouthpiece that allows you to freely change the tone while maintaining the same blowing feel, realized through the ideas of Yu Tamaki. The Topaz is an American sound type, characterized by a robust and deep ff and a breathtaking pp. Inner rim diameter: 25.4mm Cup depth: Medium Throat diameter: 7.08mm For large shank There are some minor scratches from use. I think the condition is good, but please refrain from purchasing if you are nervous as this is a used item. Thank you.