Martin MA180S Marquis Silked 80/20 Bronze X-Light 12-String Guitar StringsMartin Authentic Acoustic Marquis Silked strings feature a soft silk wrap that prevents wear and tear on the bridge holes and bridge plate as you play. The added thickness also ensures that bridge pins will stay locked in place, even in older bridges with worn holes. Gauge: Extra Light 12 String E: . 010 . 010 B: . 014 . 014 G: . 023 . 010 D: . 030 . 012 A: . 039 . 018 E: . 047 . 027 Tension: 261. 7