• Model: D'Addario EJ39
• Gauge: Medium, .012–.052
• Strings: 12 (six courses)
• Wrap wire: Phosphor bronze
• Core: Hexagonal high-carbon steel
• Construction: Round wound, uncoated
• Fits: 12-string steel-string acoustic guitars
• Not for: six-string guitars, or nylon-string classical guitars
• E course: .012 plain and .012 plain, 23.4 lb each
• B course: .016 plain and .016 plain, 23.3 lb each
• G course: .025 phosphor bronze wound and .010 plain, 32.8 lb and 22.9 lb
• D course: .032 phosphor bronze wound and .014 plain, 29.9 lb and 25.2 lb
• A course: .042 phosphor bronze wound and .020 plain, 28.9 lb each
• Low E course: .052 phosphor bronze wound and .030 phosphor bronze wound, 24.2 lb and 33.6 lb
• Made in: USA (D'Addario, New York)