This excellent value pack contains the following Percussion Plus Harmony xylophones: PP7023 - soprano diatonic (range: C52 - A73) PP7025 - alto diatonic (range: C40 - A61) PP7027 - bass diatonic (range: C28 - A49) The xylophones are fitted with prime quality removable paduk notebars with a storage box on these instruments to house the Bb and F# notebars which are supplied with the diatonic xylophones.