The Martin M550 Medium Acoustic Guitar Strings Phosphor Bronze - These phosphor bronze wound strings have a warmer, earthier tone than Martin's standard bronze strings, and tend to be a bit longer lasting too.
The Martin M550 Medium Acoustic Guitar Strings Phosphor Bronze for acoustic guitar.* Full set of phosphor bronze / steel strings from the world's most famous acoustic guitar maker.
* Medium - Gauges 13, 17, 26, 35, 45, 5