The Martin Authentic Acoustic Flexible Core Silk & Phosphor Guitar Strings are designed to reduce finger fatigue, give a silky feel and allow for huge bends.

Featuring a lighter gauge version of their Superior Performance core wire and a heavier wrap wire, these strings deliver a full and balanced tone with increased flex and playability. This set also features a silk wrap to improve the feel of the string under your fingers.

Martin's world renowned impeccable standards for acoustic guitar tone are embedded in this string design and the precision manufacturing process delivers consistent performance. This SP set also features phosphor bronze to help resist corrosion, keeping you playing smoothly, longer. Available in two different string gauges, these strings come packaged to resist humidity changes, keeping your strings factory fresh. If you want time tested tone and performance for your guitar, from a heritage brand, the Martin Authentic Acoustic SP Flexible Core Phosphor Bronze Guitar set will consistently deliver the tone you've come to know and love with increased flex.

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