Instrument Strings
Martin Guitar MA540T Authentic Treated
Martin Guitar MA540T Authentic Treated, String Set for Steel String Guitar, Thicknesses: .012" - .016" - .025" - .032" - .042" - .054", Custom Light, Material: Phosphor Bronze, Lifespan 2.0
https://www.bizrate.co.uk/strings/martin-guitar-ma540t-authentic-treated-oid10304775920.html