Martin D5200 Darco 80/20 Bronze Acoustic Guitar Strings, Medium 80/20 Bronze Darco acoustics are engineered and produced within strict tolerances Gauge (medium): .013, .017, .026, .035, .045, .056 <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.