Marcinkiewicz E10 Bob Findley Mouthpiece, Trumpet Mouthpiece, Bob Findley signature model, Outer diameter: 27.51 mm, Inner diameter: 17.22 mm, Cup depth: 9.68 mm, Bore: 3.56 mm, Overall length: 87.63 mm, Rim contour: Medium flat, Silver, Can be compared to the Purviance 4*3
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