This item must be exchanged directly through the manufacturer if it is found to be defective, and can only be returned to us if it is unopened. details
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The Martin SP High Tuning set utilizes the high tensile strength Studio Performance core wire and is available in 92/8 Phosphor Bronze. Suited for "Nashville" tuning or alternate high tunings. Works great to get a 12-string sound out of a 6-string guitar.