Martin SP Flexible Core 13-56 Med Phosphor Bronze Acoustic Guitar Strings 550FX Capo Gauge: 20-20

Gauge: 20-20

Ernie Ball RPS (Reinforced Plain Strings) Extra Slinky Electric Guitar Strings

Gauge: 11-56 (medium heavy)

a more focused low end and thicker tone

Martin SP Flexible Core 13-56 Med Phosphor Bronze Acoustic Guitar Strings 550FX Capo Gauge: 20-20Martin 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