.* These single strings are the perfect replacement when that string clicks and you're not ready to replace an entire set of guitar strings.* The highest string on a guitar is almost always the first.* It makes sense to have several backup strings to replace it as and when it breaks, as replacing an entire set can prove to be both impractical and expensive!* The internal wiring is a hexagonal carbon steel core, clear and shiny sound and a penetrating sound.* These strings offer exceptional sound and longevity.* Perfect for a damaged string without the whole set. Specification: Brand: OrpheeModel: TX620 (01-047) Material: Hexagonal Carbon Steel & Nickel Alloy Type: Acoustic GuitarSize: E-1st (0.25mm/0.010in); B-2nd (0.35mm/0.014in); G-3rd (0.58mm/0.023 in); D-4th (0.81mm/0.032in); A-5th (1.07mm/0.042 in); E-6th (1.32mm/0.052in); Package Included: 1 x Single String Acoustic GuitarNote: Please refer to the measurement. A small measurement error is acceptable within the normal range. There may be a slight color difference due to monitor, camera or other factors, please refer to the physical item.