Martin 12 String Lifespan 2.0 Treated 10-47 80/20 Bronze Acoustic Guitar Strings jazz swing The redesigned core to cover

The redesigned core to cover ratio yields a richer blend with an extended tone

Dunlop phosphor bronze strings provide rich

sparkling tone with a warm

Cryogenically treated to enhance tone and feel while creating a longer lasting and more durable string

Martin 12 String Lifespan 2.0 Treated 10-47 80/20 Bronze Acoustic Guitar Strings jazz swing The redesigned core to coverMartin 12 String Lifespan 2. 0 Treated Acoustic Guitar Strings Gauge: 10 47 (extra light) Finish: Treated 80 20 Bronze Guitar: Acoustic 12 String Gauges . 010 . 014 . 023w . 030 . 039 . 047 . 010 . 014 . 010 . 012 . 018 . 027 Code: MA180T Martins next generation Lifespan 2. 0 strings are engineered using a new, patented technology only available from Martin. This technology was developed to protect the core wire and the wrap wire to prevent corrosion