EJ12 is a medium gauge 80/20 Bronze set that offers heavier gauges for increased volume and projection. 80/20 Bronze, the original acoustic alloy introduced to by John D'Addario Sr. and John D'Angelico in the 1930s is a popular alloy for recording due to their crisp, deep and projecting tone and appeal to many traditionalists and vintage enthusiasts for their historical significance. Ideal For: All Genres EJ12 is a medium gauge 80/20 Bronze set that offers heavier gauges for increased volume and projection. 80/20 Bronze, the original acoustic alloy introduced to by John D'Addario Sr. and John D'Angelico in the 1930s is a popular alloy for recording due to their crisp, deep and projecting tone and appeal to many traditionalists and vintage enthusiasts for their historical significance. String Tension Chart Item # Note Diameter Tension PL013 E 0.013 in 27.42 lbs PL017 B 0.017 26.31 BW026 G 0.026 34.20 BW035 D 0.035 34.00 BW045 A 0.045 31.61 BW056 E 0.056 26.74 Product Features Coating: Uncoated Number Of Strings: 6 Set Type: Sets, Multipacks Wrap Material: 80/20 Bronze