YAMAHA-Mouthpiece Trumpet Signature Jazz Bobby Shew

YAMAHA-Mouthpiece Trumpet Signature Jazz Bobby Shew, rim inner diameter: 16.85mm, rim contour: semi-round, rim thickness: semi-thick, cup depth: standard, throat: 3.65mm, backbore: standard, the Jazz model has a fairly deep roomy cup for a warm, big sound, and a throat and backbore designed to give enough -jump and snap- for maneuvering through quick jazz passages with a rich full sound.