Function: 1 The string is very suitable for Ukulele legitors as a good accessory, and has a long life. 2. The carbon string features very bright tone (actually some carbon strings are too bright), loud volume, and long lasting durability. 3 Volume and tone attenuation are not obviously if used for a long time. Keyboard musical instrument is even more interesting. 4 The precisely intertwined base string creates warm, distinctive sound and is very consistent. 5 4 piece set can replace all strings of 4 string guitars. Specifications: Item Type: Ukulele String Specifications: Approx. 1 String: 0.52 mm, 2 Strings: 0.65 mm, 3 Strings: 0.74 mm, 4 Strings: 0.55 mm