The L-15A4L has a semi-flat rim that is very comfortable. It has some undercut for chop room, which will make the inside diameter feel a little larger than the specs reflect. The cup is medium to medium deep, with a rounded entrance to the throat to promote good air flow for a nice big sound. The throat is a #27, the throat cylinder length is enhanced, and the backbore is a Legends S. The elements of this model work together to maximize endurance and range and improve slotting for the player. Customers that have played this piece have used it for solo, lead, jazz, or any style of playing, and it can really deliver that extra zing when needed!