The Martin Authentic Acoustic Superior Performance Silk & Steel Guitar Strings feature higher strength and tin-plated core wire on all six strings that enable a fuller and more balanced tone, quicker response and increased tuning stability. Martin’s impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process, making them some of the best acoustic strings you can have! This set is gauged at 11.5 – 47 Custom.

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