The Circus has a nice comfortable semi-round rim. The cup is shallow (similar to Bach E). The entrance to the throat is rounded, which allows for good air flow and a nice big sound. Slotting with this model is excellent. This piece was inspired by some mouthpieces used historically by circus music performers. It is not a copy of any one mouthpiece, but is a Legends Brass unique creation. It has the Legends enhanced throat (#27), enhanced throat cylinder length, and Legends S backbore. Customers that have played the Circus have used it for all-around work, with some extra zing when needed. It’s a good mouthpiece for general playing and for upper register musical acrobatics!