The Corps Lead was developed with drum corp and other outdoor performance venues in mind. The rim has a .630″ inside diameter, and is medium round on the outside and inside edges and semi-flat on top (similar to a Schilke 4 rim). The cup is medium shallow to shallow (similar to Bach D/E). This rim and cup combo is comfortable for upper register playing while on the move. Combined with the Legends S backbore and heavyweight blank, this mouthpiece has the elements needed for intensity and endurance in the upper register, without sacrificing a good quality sound. The Corps Lead is perfect for high energy performances in stadiums or arenas where good projection and solid core of sound are needed.