Globally recognized for superior craftsmanship and meticulous attention to detail since 1983, Lee Oskar Harmonicas pioneered an interchangeable and replaceable system of reed plates, combs and cover plates that has become the industry?s gold standard. The Lee Oskar Harmonicas System features four distinct harmonica models in standard and altered tunings, available in multiple keys, for playing many different musical genres. Major Diatonic (model #1910 ? Orange Label): The Lee Oskar Harmonicas Major Diatonic makes it easy to play BLUES, FOLK, ROCK, COUNTRY, POP and MORE! Available in these 18 keys (listed low to high): Lo C, Lo D, Lo E, Lo F, Lo F#, G, Ab, A, Bb, B, C, Db, D, Eb, E, F, F#, Hi G .