Resin top tube, B3V/B1-1/2V.
 This is a hybrid mouthpiece with a Bach 3C/1-1/2C rim and a Bach 5V cup.


 This setting is perfect for those who like the sound of 5V but prefer smaller rim sizes.
 It's a deeper, darker, and more mellow sound than an A-cup.


 Of course, as long as the screw specifications match, it can also be used as a cornet top.


 This mouthpiece is perfect for playing in jazz combos, cornet solos in wind ensembles, and any solo performance where a dark tone is required.
 The throat fits 27, Warburton, and Kanstul backbores.


 The threads are cut just a little tighter than they should be.
 Since it's made of a softer material than metal, please adjust the fit a few times to match your existing underband. For the last few turns, do so while it's attached to your instrument; the instrument will act as a makeshift jig, ensuring a perfect fit.


 Backbore is not included.