Yamaha Alain Trudel Mouthpiece Tromb.
Yamaha Alain Trudel Mouthpiece Tromb., Mouthpiece for Trombone, Alain Trudel Signature Model, Internal diameter: 25.23 mm, Rim contour: Semicircular, Cup depth: Deep, Bore: 7.15 mm, Backbore: Narrow, Finish: Completely silver plated