Gauges 10-14-23-30-39-47.

Martin MSP4600 Phosphor Bronze Extra Light 12-String 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 deliver deep, rich basses and clear, bright trebles.

Martin strings are high-quality strings designed for daily use. Core and wrap wires must meet strict requirements make the grade. Martin 12-string acoustic guitar strings are wound to precise specifications.