Martin MSP4000 SP Phosphor Bronze Acoustic Guitar Strings Extra Light

Martin MSP4000 SP Phosphor Bronze Acoustic Guitar Strings Extra Light 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.