Miraphone Hagen 497 07000 Bb- Tuba, 6/4 size, 4 valves, bell diameter Ø 480 mm (18,897 inch), rotory valves, bore size: Ø 21,20 mm (0,835 inch), Minibal ball joints, spiral spring system, brass body and bell, clear lacquered, height: 101cm, weight: 11,0kg, incl. mouthpiece