I make two models eight note (one octave) and thirteen note (1.5 octave)
The one octave Xylophone is tuned to the key of "C major". It is intended for a child, it comes with a tune book, that a child can can play the tune (nursery rhymes) by numbers or colors
The 13 note Xylophone is tuned to the key "F Major" which give you three notes below the scale, and two note above.
Both are constructed of solid Cherry Wood, and thick aluminum bars. They both come with beaters and a tune book.