willie's Custom Brass Willie's Trombone Mouthpiece VENUS AP Alto GP Finish (L)

This mouthpiece was developed for alto trombone, but it also has the character of a thin-bore jazz trombone. Supervisor: Toshihiro Shirahama (Associate Professor, Kurashiki Sakuyo University) GP finish, rim diameter 25.40 (mm), throat diameter 6.10 (mm), similar to other companies' size: Buck 6-1/2AM