The Legends L-BL3 has a semi-flat rim that is very soft and has a nice comfortable inside roundness. The high alpha angle lends a gentle slope into the cup, and there is some undercut for chop room. The cup is shallow, similar to Bach E. The throat is slightly tight (#28), which allows higher efficiency of air flow. The backbore is the Legends S, which is excellent for mid-range to upper register playing. The L-BL3 gives the player enhanced endurance, range, and slotting with less effort, making it a perfect upper register lead mouthpiece.