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U.S. Navy Fleet Bands requires 8 sets of Yamaha YSH-301WC Fiberglass BBb Sousaphones with SH-43 molded plastic cases with wheels. These instruments are essential to all naval ceremonial, public outreach, and diplomatic missions world-wide. Yamaha Sousaphones are the standard by which all other brands are compared based on performance quality, world class customer support, and long operating life. They represent the best quality and value to the United States government.