The XBCH Chromatic portion is use with the XBD Bass Diatonic Xylophone.
For the keyboard bars, Bergerault use a special Composite material to insure the long term accuracy of tuning a nd pitch, even in humid climates.
F# and Bb bars are always included with diatonic instruments and should therefore be added to chromatic sections purchased to complete the full chromatic instrument.
Bars: 6 Extra wide Rosewood bars
Size: 40 mm x 19 mm
Range: C#3 to G#4
Standard Tuning: A= 440 Hz