Studio 49 AX2000, Alto Xylophone, Diatonic, Pitch from c1 to a2, Rosewood (Dalbergia Stevensonii) tone bars, Harmonic upper tuning, Resonator box made of solid wood, Interchangeable f# and B bars, Can be expanded to a chromatic instrument by semitone boxes with c#, d#, g# (16 bars 45 x 20 mm), Includes 2 mallets S4