Conn 20K Brass Brass Sousaphone, Standard
Key of BBb, all brass, .734" bore, 26" bell, exclusive offset short-action pistons, clear lacquer.
The 20K Series has been Conn's most popular sousaphone for many years. The 20K Bb features a .734-inch bore with the exclusive offset short action valves for ultimate player comfort plus a 26" bell and rugged body and brace construction for years of reliable service. The 20K offers excellent projection and tone throughout the entire range of the instrument.