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If you can gig night after night, your strings should be able to keep up. Martin SP strings are designed with the performer in mind. Made with high tensile strength core wire and finished with their highest quality wrap wire, Martin's SP line of strings stands up to rigorous practice and performance schedules to deliver consistent true tone that you can count on song after song.
Martin SP 80/20 Bronze acoustic guitar strings are made with their highest quality bronzed steel core wire and bronze wrap wire.