The Studio 49 Series 2000 Metallophone is a very well made instrument, which complements the Orff classroom. The 2000 Series metallophone is tuned to C"-A" and includes two F# and one Bb bar and mallets. The Studio 49 Series 2000 Metallophones are available in diatonic units for soprano (SM2000), alto (AM2000) and bass (BM2000) or chromatic add-on units for soprano (HSM2000), alto (HAM2000) and bass (HBM2000).