A mouthpiece for all occasions, and backed by Bach expertise, the 5G is a classic mouthpiece that comes highly reviewed and requested by teachers and musicians. This trombone mouthpiece combines a deep cup with a 25.5-millimeter diameter and a small throat for a brilliant, full-bodied tone across the low and middle registers. The medium-wide rim and semi-flat shape bolster a player’s endurance and precision by making the lip touch points comfortable. The 5G comes in both a small shank and large shank design.