The Ocean Rock Harmonica Pack 7 from Cascha includes seven high-quality harmonicas in the keys of C, D, E, F, G, A, and Bb. Each instrument features ten holes with precise tuning made of phosphor bronze, an ergonomic design, and a sturdy construction of stainless steel and ABS plastic. The rich, clear sound and modern design make this set an excellent choice for musicians. Packaged in a practical blue case.