Martin MSP4000 SP Phosphor Bronze Extra Light Acoustic Guitar Strings are made with a unique composition to give brilliance, clarity, and longevity of sound. The phosphor bronze winding alloy is ideally suited for making strings that have deep, rich basses and clear, bright trebles.
- Gauges: .010 - .047
- Bronze alloy for brilliance and long life
- Studio-quality performance
- Acoustic Guitar Strings