Martin Guitars SP - 80/20 Bronze Extra Light 10-47 [MA170] Acoustic Guitar Strin

80/20 BRONZE - MA170 Extra Light. Martin Guitars - SP - 80/20 Bronze Extra Light 10-47. Acoustic Guitar Strings. String Gauges We start with our highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don’t see matters!

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