8-tube Boomwhackers C major diatonic scale set. Includes Whack-a-Doodle Doo! songbook, XyloTote tube holder, Octavator tube cap and instructions. Includes the most popular Boomwhackers set- the C Major Diatonic Scale Set comprising 8 notes: C’ to C”. The diatonic scale allows more songs to be played and is preferred over the pentatonic set by most music educators -tubes range in length from approx 11” to 24”. Octavator™ Tube Caps, which lower the tone of the Tubes by an octave when placed on one end. The 8 pack contains enough caps to use on any of the Boomwhackers Sets. XyloTote™ Tube Holder which can be used to play the Boomwhackers as a xylophone, or used as a convenient tote and can hold, 8 Boomwhackers Musical Tubes a pair of Boomwhacker Whacker Mallets and a Whack-a-Doodle Doo! Songbook. Made of cotton, elastic and hook-and-loop fasteners.