The Yamaha size 11F4 flugelhorn mouthpiece features the best workmanship thanks to state-of-the-art computer-controlled machinery. This mouthpiece offers a full flugelhorn sound, which fits very well for the Big Band or also in the wind orchestra. Due to the medium deep cup, this mouthpiece can be played very versatile without becoming too strenuous in the long run. The medium round rim offers the musician a lot of flexibility, which is especially advantageous for large interval jumps. The flugelhorn mouthpiece 11F4 from Yamaha has an inner diameter of 16.46 mm and a bore of 3.80 mm.