Pocket Harmonica (instrument) : Great Value 10 hole Bel Canto Diatonic Harmonica that allows bending of notes and is suitable for playing Blues, Cross harp styles. These nifty wee Harmonicas are manufactured to a great standard from quality materials. Metal reed plates prevent corrosion and keep this wee gem going longer !! They're a great gift idea for singers and guitarists alike. This instrument is in the key of 'D'.