EJ17 is a medium Phosphor Bronze set that offers heavier gauges for increased volume and projection. The increased tension makes them ideal for drop or altered tunings as well. Since D'Addario introduced Phosphor Bronze guitar strings in 1974, they have been synonymous with warm and well-balanced acoustic tone. Ideal For: All Genres EJ17 is a medium Phosphor Bronze set that offers heavier gauges for increased volume and projection. The increased tension makes them ideal for drop or altered tunings as well. Since D'Addario introduced Phosphor Bronze guitar strings in 1974, they have been synonymous with warm and well-balanced acoustic tone. String Tension Chart Item # Note Diameter Tension PL013 E 0.013 in 27.42 lbs PL017 B 0.017 26.31 PB026 G 0.026 35.15 PB035 D 0.035 35.87 PB045 A 0.045 32.77 PB056 E 0.056 27.75 Product Features Coating: Uncoated Number Of Strings: 6 Set Type: Sets, Multipacks Wrap Material: Phosphor Bronze