Martin Authentic Acoustic Strings provide unrivaled quality, craftsmanship, and tone for your acoustic guitar. Designed to produce a true, consistent tone, these extra-light-gauge strings provide excellent tuning stability and playability so your guitar can thrive during your rigorous practice and performance schedule. Made from 80/20 bronze, these strings feature Martin's highest-quality wrap wire for enhanced longevity and durability. They are naturally corrosion resistant, so they will hold up after hours and hours of playing. This total pack of professional-grade guitar strings will last through long jam sessions, late-night campfire songs, and plenty of picking. To make these strings extra-durable and stable, we start with our highest-tensile-strength core wire and then tin-plate it on all 12 strings for added corrosion resistance. When the core is coupled with our highest-quality wrap wire, you get a consistent tone that you can count on song after song. Designed to bring out your guitar's true tone, these bronze guitar strings can be used for finger-style blues, rock, Americana, country, bluegrass, ragtime, and many more styles. With this pack, you'll receive 12 extra-light-gauge guitar strings. The low E strings measure 0.047" and 0.027?, the A strings measure 0.039" and 0.018?, the D strings measure 0.030" and 0.012?, the G strings measure 0.023" and 0.010?, the B strings both measure 0.014", and the high E strings both measure 0.010". This total set of extra-light-gauge strings features a tension of 261.7, and they make it easy to get a rich, bright tone out of your guitar. Martin Guitar has been producing high-quality, musician-choice guitars and guitar accessories since 1833. The Martin Authentic Acoustic Extra-Light-Gauge Guitar Strings are the real deal-not an imitation. Discover your guitar's true voice with this professional-grade guitar string pack.