Set of 6 strings: A-1st, E-2nd, C-3rd, G-4th, Ukulele. Metal strings are made of high quality nylon with colorful coating, never rust, not easy to break, very durable. The strings are smooth, clear and melodious sounds. Adopts fine finish and delicate design, easy to use and convenient to use and use as a nice gift for friends and family who love ukulele.