• 5 easily insertable and interchangeable precision printed cards allow only octave notes to be played, giving the harmonica player a clear octave sound.

  • Our precision made harmonica mold fits most standard diatonic harmonicas,such as Hohner's Special 20, Blues Harp and Marine Band. Simply insert the precision card of your choice into The Octave Master mold. Next, insert your harmonica into the mold and you are ready to go!

  • Your harmonica can easily be taken out of the mold to practice and easily put back in, saving valuable time! Detailed instruction booklet included!