Yamaha Flugelhorn 11F4 Mouthpiece

Yamaha Model 11F4. Medium inner rim diameter and unique U cup for extra endurance. Excellent attack. Similar to a Bach 7FL. Inner Diameter = 16.46mm. Contour = semi-flat. Thickness = standard. Cut Depth = standard.Throat = 3.8mm. Backbone = standard. Yamaha Flugelhorn Mouthpiece 11F4 Publisher: Yamaha Instrument: Trumpet