Percussion Plus Harmony Alto Diatonic MetallophoneThe Percussion Plus Harmony alto metallophone has a range of C40 A61. Whilst this instrument is a 13 note diatonic set it does also contain 2 x F# and 1 x Bb which enables you to play in the keys of either F or G major expanding the repertoire enormously. The note bars are produced from aluminium and are accurately tuned. They are then mounted onto a solid ply resonator box which provides a good rounded tone. The build quality is solid and lasts well