Greg Black 4G .295 Medium (Gold Plated Finish) Inner cup diameter: 26.10mm Cup: Deep Bore: 7.49mm This is a Greg Black 4G .295 bore medium weight mouthpiece, which is not often available. It is famous as the model used by David Finlayson, the second trombone player of the New York Philharmonic. When requesting gold plating as an aftermarket process, we usually apply copper plating and silver plating over the original silver plating as a base before applying gold plating. This mouthpiece has gold plating applied directly over the original silver plating, resulting in a finish almost identical to one that has been gold plated from the start. I feel that this method enhances the resonance and provides a more comfortable playing experience compared to the usual aftermarket gold plating. It has only been used a few times for play testing and is in very good condition. This model, which is not in the standard lineup, is a rare mouthpiece, so please consider it. Please comment for price reductions, etc. Trombone Mouthpiece Greg Black New York Type: Trombone Accessories/Parts: Mouthpiece