Kühnl & Hoyer Orchestra Symphonic Bb/F/Gb/D Bass Trombone - inline, 'open flow' Meinlschmidt valves, changeable 260mm gold brass bell, detachable bell (screw ring) 143mm bore, F attachment with heavy cap, adjustable hand supports, nickel silver outer slide with changeable mouth pipe, lacquered, includes Kühnl 7.6 D mouthpiece and black Marcus Bonna Case with back straps