willie's Custom Brass Willie's Trombone Mouthpiece Colin α Series Thin Bore SP Finish (11C a)

A modern American style mouthpiece made of α material, developed with trombonist Kyoichiro Gun of the Siena Wind Orchestra. For thin tubes. Supervisor: Kyoichiro Gun (Siena Wind Orchestra). SP finish, rim diameter 24.70 (mm), throat diameter 5.90 (mm), similar to other companies' sizes. Size: Back 11C