A YAMAHA silver-finished trumpet mouthpiece with a wide rim design for a rich tone. - Brand: YAMAHA - Model: Trumpet Mouthpiece - Color: Silver - Material: Metal - Inner diameter: Wide mouth This is a Yamaha trombone mouthpiece "SL-48S". It is for small shank and has the following features: It has a very well-balanced rim and cup, making it suitable for all-around use. A highly complete model that meets the high demands of professional musicians. The inner rim diameter is 25.25mm The throat diameter is 6.62mm. This came out during decluttering, it has been used and is old. The box says 6800 yen. Please consider purchasing after understanding that it is a used item that has been used and stored. Search terms Trombone Musical instrument mouthpiece Orchestra Musical instrument Performance Music Thank you for looking.