willie's Custom Brass Willie's Trombone Mouthpiece U3 TORIZUKA Series Large Bore SP Finish (2M)

A mouthpiece with a newly designed U-shaped cup. Supervisor: Shinsuke Torizuka (Tokyo Symphony Orchestra principal) SP finish Rim diameter 26.30 (mm) Throat diameter 7.20 (mm) FST rim Semi-flat, but the inside edge is rounder than the FPS rim