Hohner 54-CG Double Sided Echo Harp Tremolo Harmonica32 holes, 64 reeds with wooden combFor more than a century, these Hohner 54 double sided harmonicas have been a player favorite. Two keys are available on each individual instrument. The Echos 54 Double Sided Harmonica precision tuned reeds create a beautifully blended vibrato tone. Available in keys of C G only. The classic Hohner 54 double sided tremolo tuned harmonica all models in this series consist of two instruments in one. The opposing keys