Instrument Strings
Gibson Phosphor Bronze Acoustic 13
Gibson Phosphor Bronze Acoustic 13, Set of Strings for Acoustic Guitar, Gauges: .013, .017, .026, .035, .045, .056, Tension: Ultra-light, Round Wound, Wound strings in phosphor bronze, Made in USA
https://www.bizrate.co.uk/strings/gibson-phosphor-bronze-acoustic-13-oid35825703906.html