Thomann EP 804GP Bb-Euphonium, model "Superior", 4 perinet vlaves (3+1), compensating system, dual bore 15,0mm- 16,80mm (0.591"- 0.661"), brass body, nickelsilver inner- and outerslides, big bell brass bell Ø 310mm (12.28"), main slide trigger, silver plated, gold trim kit (gold plated: valve caps, waterkeys, slides and trigger), incl. mouthpiece and case