The M. Hohner Echo Harp Diatonic Harmonica in key C/G with square hole is a high-quality musical instrument made of durable metal in a sleek silver color. This harmonica comes in a set that includes a box for safe storage and easy transportation. Perfect for folk and world music enthusiasts, this harmonica produces beautiful melodies with its unique square hole design. Whether you're a beginner or a seasoned musician, the M. Hohner Echo Harp is sure to impress with its rich and resonant sound.