Purchased this to use on my Courtois 155R flugelhorn. It's a great match as the sound it produces is a true flugel sound, deep and mellow as it should be and matched my Courtois beautifully.
On reflection, I should have got the 3FL as the shank would have fitted better (the 3F sits quite deep in the leadpipe) - it can always be a challenge to know which shank to get with flugel mouthpieces as it can vary so much between make and instruments. Anyway, that was my own mistake.
The mouthpiece is beautifully finished and feels very comfortable.
The service and speed of delivery from Thomann was, as always, impeccable and very fast. Thank you once again.