The Jupiter 590 University Quad Series Brass 4-Valve BBb Sousaphone features a .736-inch bore and 4-valve design to offer the same benefits of a regular concert tuba on the field. The 590 also feature a 26-inch bell. The Jupiter 590 University Quad Series Brass 4-Valve BBb Sousaphone includes an ABS molded plastic case with wheels and mouthpiece and is available in lacquer (590L) finish.