Yamaha 16F4 Flugelhorn Mouthpiece (FH16F4)

Yamaha Model 16F4. Same rim configuration as the 16C4 trumpet model, thus interchangeable. a large inner rim diameter. Similar to a Giardinelli 3FL. Inner Diameter = 17mm. Contour = semi-flat. Thickness = standard. Cut Depth = deep. Throat = 4.3mm. Backbone = standard.