The Minor Pentatonic scale is one of the most useful in popular music. Play any of these notes in the right key and you canât go wrong. By adding the âBlue Noteâ the player can add extra expression and versatility, this is known as the âBlues Scaleâ. Guitarists refer to this scale as âPlaying in the Boxâ, and it is the one of the first scales to learn when playing a solo. However, to play this scale accurately on a standard harmonica demands advanced techniques that could take years to master! Thatâs where the PentaHarp comes in.Specifications:⢠Key: E-minor⢠Reed plates (material, thickness): brass, 0.9 mm⢠Reeds (number, material): 20, brass⢠Comb (material, color): ABS, blue⢠Comb (finish): ABS⢠Mouthpiece (surface): ABS⢠Cover plates: stainless steel⢠Type: pentatonic⢠Number of holes: 10⢠Length: 10.2 cm / 4.0"