Instrument Strings
Martin Guitar MA550T Authentic Treated
Martin Guitar MA550T Authentic Treated, String Set for Acoustic Guitar, Medium, Material: Phosphor bronze, Thicknesses: .013, .017, .026, .035, .045, .056, Lifespan 2.0
https://www.bizrate.co.uk/strings/martin-guitar-ma550t-authentic-treated-oid10597242675.html