BRIGHT TONES: Martin Authentic Acoustic Strings provide excellent tuning stability and playability with bright and rich tones. Discover your guitar's true voice with this professional-grade guitar string pack. SUPERIOR STRINGS: These strings are engineered to thrive during rigorous practice and performance schedules. These silk and steel folk strings feature our highest tensile-strength core wire paired with quality wrap wire for corrosion resistance and tuning stability. VERSATILE STRING SOUNDS: Designed to bring out a consistent and true tone from your guitar, these guitar strings can be used for fingerpicking, flat picking, and other methods. Use these strings in any genre—country, bluegrass, folk, blues, rock, and more. LIGHT ACOUSTIC STRINGS: Measuring from a 0.010" high E string to a 0.047" low E string, these are high-quality acoustic guitar strings that brighten the natural tuning of your guitar, including tenor, mid-tones, and bass. They feature a tension of 263.3. AUTHENTIC ACOUSTIC: With Martin Authentic Acoustic, you get a set of strings designed for performance and playability. Martin guitars and accessories remain the choice for musicians around the world for their unrivaled quality, craftsmanship, and tone.