B&S GR51-L Bb-Tuba, Bb Tuba, Size: 4/4, 4 Rotary valves, 3B Ball bearing linkage system, Gold brass lead pipe, Nickel silver inner and outer slides, Bell Ø: 45 cm, Total height: 99 cm, Bore 1.-3. valve: 19 mm, Bore 4. valve: 20 mm, Weight: 10.5 kg, Brass, lacquered, Incl. gig bag and mouthpiece, Made in Germany