Martin SP Medium Acoustic Guitar Strings 13-56
Made from 92/8 composition alloy to give brilliance, clarity, and longevity of sound.
Martin MSP4200 Phosphor Bronze Medium Acoustic Guitar Strings use a winding alloy that 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 to make the grade. Martin acoustic guitar strings are wound to precise specifications.
Bronze alloy for brilliance and long life