Dean Markley Blue Steel Cryogenic Activated Acoustic Strings, 12-54, 2036, Medium Light Cryogenically frozen for amazing tone, sustain, and endurance. Medium Light Gauge: .012, .016, .025, .032, .042, .054 92% Copper and 8% Zinc <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.