Thomann SHF-400 Bb-Sousaphone MKII, 4 valves, body and bell made of Fiberglass, size: ring inside 53cm diameter, ring outside 78cm diameter, bell 66cm diameter, bore: 18,50 mm, weight body: 7,8kg, weight bell: 2,5kg, weight in total, incl. case: 21,4kgincl. mouthpiece and case