The Hohner Progressive Special 20 Harmonica is a harp with a distinctive sound. This mellow, slightly darker tonality has made it the professional's choice for a performing harmonica. Tuned in the key of G, this model is also ideal for beginners thanks to its smooth playability and airtight, reliable construction. Enjoy a high quality that will last. Experience a new level of comfort. The Special 20 is the first diatonic harmonica with recessed reed plates, making for a more comfortable mouthpiece and greater projection. You get warmth with this strong sound too thanks to the small back opening in the cover plates. Such a loud, rich sound suits many genres, from Folk and Country to Rock and Pop. There's a reason this is the most copied harmonica design in the world.