HIGH QUALITY MATERIALSThis Kalimba thumb piano is made of high grade acrylic and 17 carbon steel keys. Acrylic is famous for its excellent transparency and weather resistance. Whats more, it is harmless even if it contacts with people for a long time. Carbon steel has a low toughness, high plasticity and abrasion resistance, which is great for playing. CRYSTAL RAINBOWReflecting colored light under light conditions, the crystal-like acrylic material is more suitable for the crisp sound of Kalimba. EASY TO OPERATEThere is a small manual to help you master the technique, and it introduces the use and performance methods of kalimba in detail. It is fitful for beginners, kids, adults and professionals. All Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution.