The Martin M535 Custom Light 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 M535 Custom Light 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 11, 15, 23, 32, 42, 52