YAMAHA Trumpet Mouthpiece Model Number: 11A4 Finish: Silver Plated Inner Rim Diameter: 16.46mm Throat Diameter: 3.65mm This mouthpiece came with a used piccolo trumpet I purchased, but I'm not using it, so I'm putting it up for sale. It's a used item, so there are some dullness and minor scratches, but there are no shank dents. Thank you for looking. #PiccoloTrumpet #TrumpetMouthpiece