Discover your acoustic guitar's true voice with a fresh set of Martin MM102 Retro Acoustic extra light 12-string acoustic guitar strings. These are the real deal—not an imitation. With Martin MM102 Retro Acoustic strings you get one tough set of strings that'll last a long time and give you true, consistent tone like nothing else on the market. Martin's proprietary SOLID nickel/copper alloy blend provides for a reduced pick attack, which allows the guitar's tone woods to be heard, not overshadowed. It offers uniquely mellow, yet crisp, sound. Martin's proprietary wrap wire is naturally corrosion resistant.