The Studio 49 2000 Series Grillodur Xylophone is a very well made instrument, which complements the Orff classroom. The 2000 Series Xylophones feature Grillodur Fiberglass bars which offer outstanding tone that includes durability with high-impact strength plus resistance from changes in humidity to guarantee consistent permanent pitch in changing climate areas. The 2000 Series also features solid wood resonance boxes with sound-reinforcing lips on the dividers for maximum volume, especially on the alto and bass units. All resonance boxes have handles for easy transportation that also serve as supports for mobile stands. The 2000 Series Xylophone diatonic units include F# and Bb bars plus a pair of S Series mallets. The Studio 49 2000 Series Grillodur Xylophones are available with diatonic units for soprano (SXG2000), Alto (AXG2000) or Bass (BXG2000).