Griego Mouthpieces Model GP6 Bass Trombone
Griego Mouthpieces Model GP6 Bass Trombone, Mouthpiece for Bass Trombone, Artist Series, Model GP6, Cup diameter: Ø 29.0195 mm (1.1425""), Outer diameter: Ø 39.497 mm (1.555""), Bore: Ø 7.77 mm (.306""), Silver-plated