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, long lasting and durable. 3 Volume and tone attenuation are not obviously if used for a long time. The interest of your keyboard instrument is even higher. 4 Accurately intertwined bass strings create warm, distinctive sound and are very consistent. 5 4 piece set can replace all strings of 4 string guitars. Specifications: Item Type: Ukulele stringSpecification: Approx 1 string: 0.52mm 2 string: 0.65mm 3 string: 0.74mm 4 string: 0.55mm