- New Condition
Phosphor Bronze medium gauge acoustic guitar strings from Martin Strings. Martin SP ("Sustained Performance") Strings are designed for maximum tone and longevity, Ultra-high tensile strength steel cores resist breaking. Acoustic bronze electro-finish provide greater life. Martin SP strings are ideal live, in the studio, or wherever sustained playability is desired. Gauges: .013, .017, .026, .035, .045, .056
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