• .013 .017 .026 .035 .045 .056 - Set / Acoustic guitar

Martin SP+ strings use the same special bronzed core wire incorporated in the innovative SP string. Our Polymer coating offers numerous benefits, including protection from moisture, salts, perspiration and other contaminants, without sacrificing the crisp, full tone of the SP string. The surface of the string feels smoother and faster. SP+ strings offer guitarists clear, rich and long-lasting sound.