willie's Custom Brass Willie's Trombone Mouthpiece Walküre HY Series Large Bore Bass GP Finish (1.5)

The next-generation standard that lets you fully enjoy the German-style tone and sharpness. Supervisor: Hideki Yamashita (Kyushu Symphony Orchestra) GP finish, rim diameter 27.30 (mm), throat diameter 7.10 (mm), similar to other companies' sizes: back 1-3/8G