Hohner 260/40 Chromonica G Perfectly tuned brass reeds and a pearwood comb allow this model to play 2 chromatic octaves Chromatic Harmonica Complete 12-note octaves with all the sharps and flats can be played on a Chromatic Harmonica Each single hole contains four reeds; a blow reed and a draw reed for two natural notes as well as a blow reed and a draw reed for two chromatic notes A side sliding button is pushed to activate the chromatic notes, which closes off the airflow from one set of reeds and enables the other set to vibrate All Hohner chromatics except the Koch and Slide Harp are solo tuned, meaning each group of four holes covers a complete octave