S.E. Shires Trombone Mouthpiece Vintage 6-1/2AL Gold Plate This is a Vintage series small-bore trombone mouthpiece from Shires. I was using it with a King 3BS, but I'm selling it due to a change in equipment. It's genuine Shires gold plating, not after-market gold plating. Compared to V.B. mouthpieces, it has a considerably heavy weight and should generally fit instruments other than German and French horns. The mouthpiece itself is also very easy to play. In my opinion, it produced a full sound across all registers and was very flexible. Outer rim diameter: 39.25mm Inner rim diameter: 25.30mm Throat: 6.60mm *No box*