The Hohner Rocket harmonica is now available in a five set. The most popular keys C, G, A, D and Bb are stored in a carrying case. The zip opening case will hold seven harmonicas so you have space to add two more from your collection. The ergonomically designed comb has rounded sides and edges for maximum comfort. The wide open cover plates and channel design ensure maximum loudness. This allows the player to express a powerful, dynamic sound.