The Hohner Marine Band 1896 5-Pack includes diatonic harmonicas in the keys of C, D, E, G, and A, each featuring 10 holes and 20 brass reeds. The harmonicas have a double-lacquered pearwood comb, stainless steel cover plates, and a total length of about 3.9 inches (10 cm). This classic design is known for its authentic sound and is often used for blues and folk music.