3416HAL Bach 6.5AL Large Shank Trombone/Euphonium Mouthpiece
Large shank mouthpiece with an identical rim and cup to the large shank 6.5A, but with a slightly smaller bore (0.261 vs. 0.276 inch).
• 25.4mm diameter rim
• Medium-deep cup
• 0.261" throat
• 420 backbore