The Jupiter 596L Fiberglass Series BBb Sousaphone is one of the more sturdy marching instruments currently on the market. The 596L sousaphone features a durable white fiberglass body with a 26-inch bell for great projection plus an easily removable valve and slide body for easy maintenance. The Jupiter 596L Fiberglass Sousaphone is available with Hard-Shell Case With Wheels (596L).