Martin SP Flexible Core 13-56 Med Phosphor Bronze Acoustic Guitar Strings 550FX Tin Code: SB111

Code: SB111

Custom wound onto a high carbon steel hex core

High energy at your fingertips

String Material: Pure Nickel Flatwound

Code: P06220

Martin SP Flexible Core 13-56 Med Phosphor Bronze Acoustic Guitar Strings 550FX Tin Code: SB111Martin 6 String SP Flexible Core Acoustic Guitar Strings Gauge: 13 56 (medium) Finish: Phosphor Bronze Guitar: Acoustic 6 String Gauges: . 013 . 017 . 026 . 035 . 045 . 056 Code: MA550FX It isn't just about flexibility; it's about bending the note till it rings true. Martin SP Flexible Core strings marry our thinnest core wire to our standard tensions. Our SP Flexible Core strings feel soft to the touch, making them ideal for beginners. But don't be