Thank you for viewing. This item is brand new and unused. Instant purchase is welcome. Contents: 1 set Gauge: 10-13-17-26-36-46 Material: Nickel Steel Hand-wound strings using high-quality metal, not junk metal, commissioned from a mil-spec wire production factory. These strings maintain a non-coated specification that doesn't sacrifice the harmonics of the guitar, and boast superior durability and longevity compared to regular strings, leveraging the quality of the materials that cannot be achieved through mass production.