Martin M2200 Marquis Acoustic Guitar Strings Med 3 Packs Medium String Gauge: .013, .017, .026w, .035w, .045w, .056w Martin Marquis strings are specifically designed to give you excellent tone, clarity, and response. The Marquis silk-wrapped ball end helps reduce wear on the bridge and bridge plate, making them ideal for valuable, vintage instruments. This alloy is comprised of 92% copper, 8% tin and traces of lead, iron, zinc and phosphor. These strings produce a bright but slightly warmer sound than the 80/20. The phosphor in the alloy helps them to retain their new sound for greater consistency. Tension: 186.2