Kalimba Thumb Piano - 7 keys - Tunable - Coconut Shell - Painted Made of natural coconut shell. Solid wood top mounted on a strong, smooth coconut gourd shell, 6-7" wide This lightweight and mini size handheld kalimba instrument can easy to carry. To adjust the sound, just tighten or loosen the two screws on the top of the piano. 7 steel keys in varying lengths produce different pitches. As each coconut is unique, the size and shape of the kalimba body will also have minor variations, and it's painted by hand, we cannot guarantee the pattern is as same as picture, and it will be shipped by RANDOM.