Suzuki PH-20-C Pipe Humming Easy Vibrato 10-Hole Diatonic Harmonica, Key of C Key of C The hauntingly beautiful sound of a harmonica vibrato is now as easy as playing the blues Get a perfect vibrato the very first time you try! Slow, fast, loud, low, flutter, any way you want to make your music sound Aluminum comb and phosphor bronze reeds combine with special nickel plated pipe cover to create a heavy, rich, deep sound.